2FAS
Security & Privacy
A local-first pair of apps: the 2FAS Auth two-factor authenticator and the 2FAS Pass password manager. Auth needs no account and supports backups.
Japanese UIEnglish UI
Ranking
Rankings based on user star ratings.
How ranks are decided
Apps with 3+ star ratings are ranked by a score computed from the average rating and the number of ratings. With few ratings, even a high average ranks lower; as ratings grow, the score approaches the real average. Rank depends on ratings only. Ratings are anonymous: one per app per browser.
Top rated
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No ranked apps yet. Apps appear here once they have 3 or more ratings.
Gathering ratings
These join the ranking at 3 ratings.
actionlint
Programming & Dev Tools
A static checker for GitHub Actions workflow files, published as a linter that finds mistakes before the workflows run.
Free planEnglish UIIndie
Actual Budget
Daily Life & Utilities
A local-first, privacy-focused personal finance app built around envelope budgeting, with an optional self-hosted sync server.
Japanese UIEnglish UI
Aegis Authenticator
Security & Privacy
A free, open-source Android app for managing 2-step verification tokens. Tokens are kept in an encrypted vault with optional biometric unlock, per the official site.
Japanese UIEnglish UI
AI Anime Generator
AI & Generative AI
A web tool that generates original anime-style illustrations from text prompts or photos. Choose from styles such as chibi, retro anime and pixel art, with prompt input in Japanese. New users receive 40 free credits with no expiration, and additional credit packs start at ¥780.
Free planAIJapanese UIEnglish UI
AIAvatarKit
AI & Generative AI
A Python toolkit for quickly building conversational AI avatars, published by the same GitHub account (uezo) as ChatdollKit.
Free planAIIndie
AivisSpeech
AI & Generative AI
Free speech synthesis software that produces emotionally expressive voices, usable for video narration, voice dramas and similar.
Free planAIJapanese UI
Akaunting
Business & Operations
Free, open-source online accounting software for small businesses and freelancers; send invoices and track expenses.
Japanese UIEnglish UI
Anki
Education & Learning
A spaced-repetition flashcard program. The desktop version is free and cards sync across devices via AnkiWeb.
Free planJapanese UIEnglish UI
AntennaPod
Mobile Apps
An open-source podcast manager for Android. It subscribes to any RSS feed, downloads episodes for offline listening and has no ads in the app.
Japanese UIEnglish UIIndie
Anvil: Private & Offline AI
AI & Generative AI
Private AI that runs on your iPhone, even offline. I'm Nathan Cheng, developer of Anvil. Anvil is a private AI assistant that runs on your iPhone. Chat offline, translate a sign from a photo, pull points from a PDF, transcribe meetings, and create images. No account, no ads, chats stay on your phone. Requires iPhone 15 Pro or newer.
Free planAIJapanese UIEnglish UIIndie
AnythingLLM
AI & Generative AI
A free, private AI assistant that runs on your own device, with no accounts, API keys or token limits required according to the official site.
AIJapanese UIEnglish UI
Ardour
Video, Audio & Music
An open-source digital audio workstation for recording, editing, mixing and mastering audio and MIDI.
Japanese UIEnglish UI
assift(アシフト)
Daily Life & Utilities
A web service dedicated to building shift schedules: AI drafts a schedule from your conditions, and you share it by URL. Free for up to 10 staff.
Free planAIJapanese UI
AtCoder
Education & Learning
A competitive programming site that holds regular contests of several kinds such as ABC, ARC and AGC, with rankings and practice contests.
Japanese UI
AtCoder Problems
Web Services & Online Tools
A web app that helps AtCoder users solve problems and manage their progress, under the tagline 'Extend your AtCoder'.
Free planJapanese UIIndie
Atuin
Programming & Dev Tools
A tool to sync, search and back up shell history with end-to-end encryption, available for macOS, Linux and Windows.
AIEnglish UI
AudioEditDesk
Video, Audio & Music
Free browser audio editor: trim, volume, fades, convert (for example OGG to MP3), and export MP3 or WAV. Local processing; no account.
Free planJapanese UIEnglish UI
Authelia
Security & Privacy
An open-source authentication and authorization server providing multi-factor authentication and single sign-on. It also works as an OpenID Connect 1.0 provider alongside reverse proxies.
Japanese UIEnglish UI
AutoHotkey
Daily Life & Utilities
A free keyboard macro program with hotkeys for keyboard, mouse and joystick, and abbreviation expansion as you type.
Be Serious
Mobile Apps
Be Serious is an iPhone habit app for iOS 18+. Lock chosen apps with Screen Time until you complete your habits and earn them back. It rewards follow-through instead of only blocking. Available on the App Store.
English UI
Bella and Pan
Education & Learning
A storybook math game for kindergarten through fifth grade. Children solve arithmetic to move through three Chapters and find the village’s missing toys. Four difficulties cover addition through order of operations. The Adventure includes animated written help and plays offline. A separate five question Apple Watch game is included. One purchase, with no ads or accounts.
English UIIndie
Biome
Programming & Dev Tools
A toolchain for web projects offering a formatter and linter, usable via CLI and LSP.
Japanese UI
Booking Package
WordPress (plugins & themes)
A booking plugin that lets you take reservations such as rooms, services and events directly on WordPress pages.
Free planJapanese UI
Breakly: Screen Time Limit
Mobile Apps
Breakly is an iPhone and iPad screen time app that interrupts mindless scrolling with mini and long breaks. An optional Strict Mode keeps distracting apps locked during a break.
Free planJapanese UIEnglish UI
Briar
Mobile Apps
An Android messenger that bypasses central servers, sending messages over Bluetooth, Wi-Fi or Tor. Data is stored on the device and nearby contacts can chat offline.
Japanese UIEnglish UI
Bruno
Programming & Dev Tools
A Git-native API client for REST, GraphQL, gRPC and WebSocket that works locally with no cloud syncing according to the official site.
English UI
Button: Baby Weather & Outfits
Daily Life & Utilities
Know what your baby should wear today. Button looks at the weather, the baby's age and whether the baby is in the stroller, the carrier or the car, then shows the baby already dressed. For babies and toddlers from 0 to 36 months. The website is free. Languages: English, German, French, Spanish, Italian, Russian.
Free planEnglish UIIndie
Cal.diy
Business & Operations
A community-driven, MIT-licensed, self-hosted scheduling tool forked from Cal.com with enterprise features removed. No managed version exists; personal, non-production use is recommended.
Japanese UIEnglish UI
Cataclysm: Dark Days Ahead
Games & Entertainment
A turn-based survival RPG set in a post-apocalyptic world, presented on its official site as an open-source development project.
Japanese UIEnglish UI
Celeste
Games & Entertainment
A precision platformer in which Madeline climbs Celeste mountain while confronting her inner struggles.
Japanese UI
Charity Malaysia
Social & Communication
Charity Malaysia is a Malaysia-wide directory for exploring charities by cause or state, reviewing organization profiles, and finding a clear next step to offer help.
Free planEnglish UI
Chatbox AI
AI & Generative AI
An AI client for using GPT, Claude, Gemini, DeepSeek and more with your own API keys, free to start on desktop, mobile and web.
Free planAIJapanese UIEnglish UI
ChatdollKit
AI & Generative AI
A Unity SDK for turning a 3D model into a voice-enabled chatbot. It supports several LLMs such as ChatGPT, Claude and Gemini and speech synthesis such as VOICEVOX and AivisSpeech.
Free planAIJapanese UIIndie
CleanPricer
Business & Operations
CleanPricer helps residential cleaners and small cleaning businesses work out what a job should cost and send a professional quote. See typical U.S. state price bands, set your own rate, then send PDF quotes and invoices from your phone. Free web calculators estimate prices by size, rooms, type and frequency. Free on Google Play with optional Pro.
Free planEnglish UI
Clibor
Daily Life & Utilities
A free clipboard-history tool for Windows that keeps copied text and pastes saved phrases instantly.
Japanese UI
CloudSecure WP Security
WordPress (plugins & themes)
A Japan-made security plugin that protects the admin area and login URL from unauthorized access, with simple on/off feature toggles.
Free planJapanese UI
CMAN インターネットサービス
Web Services & Online Tools
A site for IT engineers and web creators with tools such as server monitoring, QR code generation, an .htaccess generator and image editing. Almost all services are described as free.
Japanese UI
CmdDeck
Mobile Apps
A command reference app for IT work on iOS, iPadOS and macOS. It lists 1,510 commands and 120 troubleshooting flows, works fully offline, supports 9 UI languages and is a one-time purchase.
Japanese UIIndie
COEIROINK
AI & Generative AI
A free speech synthesis app that reads text aloud in character voices. It is distributed for Windows, Mac and Linux, and lets users create their own voice with the MYCOEIROINK feature.
Japanese UI
Comfortable Admin Page
WordPress (plugins & themes)
Gathers hard-to-reach admin settings in one place so you can tailor a friendlier WordPress dashboard.
Free planJapanese UI
ComfyUI
AI & Generative AI
A node/graph-based tool for building visual AI workflows such as diffusion image generation, available as a desktop app and cloud service.
Free planAIJapanese UIEnglish UI
Compare Two Lists
Web Services & Online Tools
Paste two lists or import TXT/CSV/XLSX, compare in the browser, then export only-in-A, only-in-B, both, and duplicates.
Free planEnglish UI
Contradado
Games & Entertainment
A strategy roguelike played with poker dice for iPhone and iPad. One-time purchase (US $4.99 / Spain 5,99 €), no ads, no in-app subscriptions, works offline.
English UI
Coolify
Programming & Dev Tools
A self-hostable PaaS for deploying apps, databases and 360+ services to your own server, positioned as an open-source alternative to Heroku.
Free planJapanese UIEnglish UI
Cosense (Scrapbox)
Business & Operations
A tool for sharing and organizing knowledge by writing and linking pages. Free for personal or non-profit use; the Business plan is listed at JPY 1,100 per user per month.
Free planJapanese UI
CotEditor
Programming & Dev Tools
A lightweight plain-text editor for macOS with syntax highlighting and regex search, plus CJK-friendly features such as vertical text and encoding detection. It is free on the Mac App Store.
Free planJapanese UIIndie
CrowdSec
Security & Privacy
A security service providing IP reputation and threat feeds built from real production servers, together with its open-source Security Engine.
Cryptomator
Security & Privacy
Free open-source software that encrypts files on your device before they go to cloud storage. The site lists Cryptomator for individuals and Cryptomator Hub for teams.
Free planJapanese UIEnglish UI
CryptPad
Web Services & Online Tools
An end-to-end encrypted, open-source collaborative office suite with documents, spreadsheets, forms and kanban boards. It can be self-hosted.
Free planJapanese UIEnglish UI
Daily Mahjong Solitaire
Games & Entertainment
A browser-based mahjong solitaire game. Match free pairs of tiles across layered puzzle layouts, with hints, undo and redo, shuffle and solver assistance. Browse puzzles and track scores and progress.
Free planEnglish UI
darktable
Image, Photo & Design
An open-source photography workflow application and raw developer, as described on its official site.
Japanese UIEnglish UI
Delta Chat
Social & Communication
A decentralized and secure messenger with multi-profile and multi-device support, plus interactive web apps inside chats for gaming and collaboration.
Japanese UIEnglish UI
DiagramSmith
Web Services & Online Tools
DiagramSmith is a diagram maker that runs in your browser, with apps on Android and Windows. Make flowcharts, UML, ER diagrams, Gantt charts, timelines, org charts and mind maps from a template or blank canvas, open .drawio and Mermaid files, and export PNG, SVG or PDF. No account needed for free use. Pro adds vector PDF, editable .drawio export and a flowchart check.
Free planEnglish UI
Dify
AI & Generative AI
A platform for building agentic workflows, agents and knowledge pipelines on one canvas, deployable on cloud, in your VPC, or self-hosted.
Free planAIJapanese UI
Drawpile
Image, Photo & Design
A free and open-source collaborative drawing program that lets several people draw, sketch, paint and animate on the same canvas at once.
Japanese UIEnglish UI
DriveBattle
Travel, Maps & Transit
DriveBattle is a drive tracker for motorcycle and car crews. It records every ride automatically, ranks you against your crew each week, and offers turn-by-turn navigation. Premium adds twisty routes, offline maps and lean angle analysis. Tracking, crews and rankings are free.
Free planEnglish UI
Duck City
Games & Entertainment
Duck City is a cosy life simulation game for iPhone and iPad. Open shops, decorate homes and grow a village full of ducks at your own pace. It is free to play with optional in-app purchases.
Free planEnglish UIIndie
Dwarf Fortress
Games & Entertainment
A long-running fortress-building simulation about managing a dwarven settlement. The official site points to Steam and itch.io and offers a Classic version download.
Free planEnglish UI
Echobell
Programming & Dev Tools
Echobell turns webhooks and emails into instant mobile alerts on iOS and Android. Create a channel for a unique webhook URL or email address, then choose standard push, time-sensitive alerts that can bypass Focus modes, or call-style alerts for critical events. Share channels with your team, use templates and conditions, and keep notification history private on your device.
Free planJapanese UIEnglish UI
Editor Bridge
WordPress (plugins & themes)
Extends the block editor's core blocks with extra styles and formats.
Free planJapanese UI
Ente Auth
Security & Privacy
A free, open-source two-factor authentication app with end-to-end encrypted backups and sync across devices. It can also be used offline without an account.
Japanese UIEnglish UI
Etherpad
Web Services & Online Tools
A real-time collaborative editor you host yourself. It shows authorship by colour, lets you replay history, and can be extended with plugins.
Japanese UIEnglish UI
Evyren: Screen Time Pause
Mobile Apps
Evyren adds a short pause before opening selected iPhone apps during active hours, then lets you continue or step away. Review daily and weekly records of your choices and export local data. Requires iOS 17 or later. Free for up to 3 apps and basic reports, with optional Pro in-app purchases. Supports English and Simplified Chinese.
Free planEnglish UI
Excalidraw
Image, Photo & Design
An open-source virtual whiteboard for sketching hand-drawn-style diagrams and wireframes in the browser, with real-time collaboration, end-to-end encryption, and PNG/SVG export.
Free planJapanese UIEnglish UI
Exercism
Education & Learning
A free platform for learning and practicing programming, with exercises, mentoring and a CLI. It is run by a UK-registered not-for-profit.
Free planEnglish UI
ExtractMint
Finance & Budgeting
ExtractMint converts bank-statement PDFs into reviewable Excel or CSV rows. Check dates, descriptions, amounts, and balance warnings before export. Files are processed in your browser, and the current beta is free without sign-up.
Free planEnglish UI
Fedibird
Social & Communication
A general-purpose Mastodon server in Japan run by admin noellabo, offering many original features. New registrations were suspended at the time of checking.
Japanese UIIndie
FireAlpaca
Image, Photo & Design
A free paint tool with brushes, layers, comic panel features and filters; a paid FireAlpaca SE is sold on Steam.
Free planJapanese UI
Firefly III
Daily Life & Utilities
A free, open-source personal finance manager that you run on your own server.
Japanese UIEnglish UI
FlagPlayLab
Health & Fitness
FlagPlayLab is a free play designer for flag football coaches. Drag players onto the field, draw routes, load formations from 4v4 to 8v8 or 11-a-side, check NFL FLAG rules, and print or share the play. Also includes basketball play and court-diagram tools. The web version needs no account. Optional Pro adds sideline game-day tools.
Free planEnglish UI
Flarum
Social & Communication
Free, open-source forum software built by its community. The official site describes it as extensible and fast.
Flexible Table Block
WordPress (plugins & themes)
Adds cell merge/split and per-element styling to the table block in the block editor.
Free planJapanese UI
Flipic Lens
Image, Photo & Design
Flipic Lens is a native Mac photo viewer and culling app. Open a folder without importing a library, compare two or four photos with synchronized zoom, rate images with XMP stars, and export your selections. The core is free and MIT-licensed; Pro features are optional and paid.
Free planJapanese UIEnglish UIIndie
Food to Mood
Health & Fitness
An iPhone meal photo journal that pairs estimated forecasts with later check-ins for energy, digestive comfort and heaviness. The first meal scan is free; further scans and check-ins require Premium. A general wellness journal, not medical or dietary advice.
Free planAIEnglish UIIndie
FormNest
WordPress (plugins & themes)
A form plugin built around Japanese contact-form conventions, with a confirm screen and postal-code address autofill.
Free planJapanese UI
FourType
Education & Learning
FourType is a free 40-question temperament test that maps classic patterns into 16 profiles. It gives practical reflections on communication, relationships, work, and personal growth without requiring an email to take the quiz.
Free planJapanese UIEnglish UI
Fukasawa
WordPress (plugins & themes)
A minimal masonry-style blog theme for photographers and collectors.
Free planJapanese UI
GCompris
Education & Learning
An educational software suite for children aged 2 to 10 with more than 100 activities covering reading, arithmetic, science and geography. It is developed by the KDE community.
Free planJapanese UIEnglish UI
Geek Dictionary: Bilingual ESL
Education & Learning
Geek Dictionary is a visual, bilingual dictionary for new English learners. Every English word is shown with pictures and video, and explained in your own language. Free to download, with in-app subscriptions.
Japanese UIEnglish UI
Gitea
Programming & Dev Tools
A painless self-hosted all-in-one software development service including Git hosting, code review, package registry and CI/CD.
Free planJapanese UIEnglish UI
GoToSocial
Social & Communication
A lightweight ActivityPub server written in Go. The official site says it lets you share posts with friends without being tracked or advertised to.
Graphite
Image, Photo & Design
A free, open-source 2D graphics tool (alpha) that combines vector editing and node-based generative design, running as a web app.
Grocy
Daily Life & Utilities
A household management tool that bills itself as "ERP beyond your fridge", an open-source project you host yourself.
Japanese UIEnglish UI
GROWI
Business & Operations
An open-source Markdown wiki for team knowledge sharing, with real-time co-editing, permissions and an AI agent.
AIJapanese UI
Guitar Tuner: StringSync
Video, Audio & Music
Guitar Tuner: StringSync is an Android app from LP App Studio for tuning a guitar. It is available on Google Play as a one-time purchase with full access and no subscriptions.
English UIIndie
Gyazo
Web Services & Online Tools
A capture tool for screenshots and video that creates a shareable URL right away. It offers shortcut capture, OCR search, tags and collections.
Free planAIJapanese UI
HandBrake
Video, Audio & Music
An open-source, GPL-licensed, multiplatform, multithreaded video transcoder.
Japanese UIEnglish UI
Handy
Web Services & Online Tools
A novel-writing tool for web fiction writers. It keeps the manuscript editor, chapter and scene plots, character and worldbuilding references, memos and tasks in one place. Dialogue in corner brackets stays highlighted, ruby text appears in bold, and reference items can be inserted with @-mentions next to the editor. Available on the Web and as iOS and Android apps, free of charge.
Free planJapanese UIIndie
Hayabusa(隼)
Security & Privacy
A Rust tool that builds fast forensic timelines and performs threat hunting on Windows event logs using Sigma rules, developed by Yamato Security.
Japanese UI
Healthchecks.io
Web Services & Online Tools
A monitoring service for cron jobs and other scheduled tasks. It alerts you when a job's ping arrives late or not at all, and the official site says 20 jobs can be monitored for free.
Free planEnglish UI
HEIC.best
Image, Photo & Design
HEIC.best is a free online tool for iPhone HEIC/HEIF photos. Convert HEIC to JPG, PNG or PDF right in your browser, view photos in a viewer, and extract video from Live Photos. No installation or account needed. Conversion happens on your device, and your photos are never uploaded to a server.
Free planJapanese UIEnglish UI
hledger
Daily Life & Utilities
Plain-text accounting software, described on its official site as "plain text accounting, made easy".
Indie
Hono
Programming & Dev Tools
A small, simple and ultrafast web framework built on Web Standards that runs on Cloudflare Workers, Deno, Bun, Node.js and more.
Hoppscotch
Programming & Dev Tools
An open-source API development ecosystem available on web, desktop and CLI, with offline, on-prem and cloud options.
Japanese UIEnglish UI
Horarios VLC (Moverse por Valencia)
Travel, Maps & Transit
EMT, Metrovalencia and Renfe timetables in Valencia, free and with no sign-up. A free web and app for getting around Valencia: real-time next EMT arrivals, plus Metrovalencia, Renfe Cercanías and Valenbisi timetables, with a stop map; no sign-up and no intrusive ads.
Free planIndie
Ice Cubes
Mobile Apps
An open-source Mastodon client written in SwiftUI, published from developer Dimillian's personal GitHub account.
Japanese UIEnglish UIIndie
ImageGlass
Image, Photo & Design
A fast, modern image viewer supporting more than 90 formats, available for Windows, macOS and Linux per its official site.
Japanese UIEnglish UIIndie
Immich
Image, Photo & Design
A self-hosted photo and video management solution with a mobile app and web interface. It supports backup, albums, sharing and ML-based search.
Free planAIJapanese UIEnglish UI
Invoice Ninja
Business & Operations
Invoicing software for freelancers and small businesses covering invoices, quotes, expenses, time tracking and projects, with a free plan.
Free planJapanese UIEnglish UI
Jan
AI & Generative AI
An open-source ChatGPT alternative that runs AI models locally on your computer, and can also connect to cloud models such as GPT and Claude.
AIJapanese UIEnglish UI
Joplin
Daily Life & Utilities
A privacy-focused open-source note-taking app with sync across devices and end-to-end encryption.
Japanese UIEnglish UI
Jotoba
Education & Learning
A multilingual Japanese dictionary built on free resources. It covers words, kanji, names and radicals and exposes a public API.
English UI
Kanboard
Business & Operations
A free and open-source Kanban project management software.
Japanese UIEnglish UI
KantanProEX（DT）
Business & Operations
Manage customers, orders, estimates, invoices, and partner companies on one screen with this business app for Mac and Windows. Data is stored only on your computer and works without an internet connection. All features are available for the first 30 days, and main features remain free afterwards. The paid version includes a perpetual license key with additional features such as LAN sharing, recurring invoicing, and reporting.
Free planAIJapanese UIEnglish UIIndie
KantanProEX（WP）
WordPress (plugins & themes)
Business management plugin for small businesses to use with WordPress. Manage orders, customers, services, and partner companies, create estimates, orders, invoices, and save as PDF, manage work progress, and sales reports on one screen. Can be shared with multiple staff, import orders and inquiries from WooCommerce and Contact Form 7. Supports Japanese and English, one-time purchase with no subscription.
Free planAIJapanese UIEnglish UIIndie
Karakeep
Daily Life & Utilities
An open-source bookmark manager for links, notes and images, with AI auto-tagging and self-hosting; apps for iOS, Android, Chrome and Firefox.
AIJapanese UIEnglish UI
Kdenlive
Video, Audio & Music
A free, open-source video editor from the KDE community, developed by a small, mostly volunteer team.
Japanese UIEnglish UI
KeePassXC
Security & Privacy
An open-source cross-platform password manager that stores encrypted passwords locally and auto-fills them. The site says it has no cloud, ads or trackers.
Japanese UIEnglish UI
Keitai
WordPress (plugins & themes)
A tribute to early-2000s Japanese mobile sites (NTT DoCoMo 502i era): single 240px column, no front-end JavaScript.
Free planEnglish UI
Kero Blaster
Games & Entertainment
A side-scrolling action game from the team behind Cave Story, in which a frog office worker fights monsters on a business trip.
Japanese UI
Kick Off Grid
Games & Entertainment
A browser-based daily football guessing game. Solve mystery player, national team and football buzz puzzles in six tries, then share your result card.
Free planEnglish UI
Kimai
Business & Operations
An open-source time tracker for project-driven teams, with reports and invoicing.
Japanese UIEnglish UI
Kiwix
Education & Learning
A nonprofit project that makes free knowledge available offline. It began with offline Wikipedia and now offers a reader app, hotspot and server tools.
Japanese UIEnglish UI
Kolibri
Education & Learning
An offline-first learning platform for delivering educational content without internet access. It is developed by the nonprofit Learning Equality.
Free planEnglish UI
Krita
Image, Photo & Design
A free, open-source professional painting program made by artists and largely volunteer contributors, licensed under the GNU GPL.
Japanese UIEnglish UI
Langflow
AI & Generative AI
A low-code AI builder for agentic and RAG apps. You can code in Python and use any LLM or vector database.
Free planAIJapanese UIEnglish UI
lazygit
Programming & Dev Tools
A simple terminal UI for git commands.
Japanese UIEnglish UI
Leantime
Business & Operations
Free, open-source project management software that says it is designed for ADHD, ADD and all brains.
Japanese UIEnglish UI
Leasy
Mobile Apps
A simple flashcard-style memorization app where you add your own words or phrases. It offers multiple-choice and typed questions, review of missed items and a random test, with data kept on the device.
Free planJapanese UI
Lemmy
Social & Communication
A decentralised discussion platform for communities, as described in its GitHub repository.
Japanese UIEnglish UI
Lightning
WordPress (plugins & themes)
A simple, easily customizable Bootstrap-based theme that works well with custom post types and taxonomies.
Free planJapanese UI
linkding
Web Services & Online Tools
A minimal, fast, self-hosted bookmark manager that is easy to run with Docker. It offers tags, archiving, a REST API and browser extensions.
English UI
listmonk
Web Services & Online Tools
A self-hosted newsletter and mailing list manager that runs as a single binary with Postgres. It offers subscriber segmentation, campaign analytics and a transactional mail API.
Japanese UIEnglish UI
LMMS
Video, Audio & Music
A free, open-source music production tool for making melodies and beats, developed by a community.
Japanese UIEnglish UI
LogonTracer
Security & Privacy
A tool that visualises and analyses Windows event logs to investigate suspicious logons, published by JPCERT Coordination Center.
Free plan
Lovecraft
WordPress (plugins & themes)
A two-column blogger theme with a full-width header image and custom accent color support.
Free planJapanese UI
Luanti
Games & Entertainment
Formerly Minetest: an open-source voxel game creation platform with a Lua API for making games and mods.
Japanese UIEnglish UI
MalConfScan
Security & Privacy
A Volatility plugin for memory forensics that extracts configuration data of known malware, published by JPCERT Coordination Center.
Free plan
Marp
Programming & Dev Tools
A family of tools for creating slide decks written in Markdown, including an extension for VS Code.
Mastodon
Social & Communication
A free and open-source decentralized social media platform, described on its official site as radically different.
Free planJapanese UIEnglish UI
Matrix
Social & Communication
An open protocol for secure decentralised communications, as its official site describes it, with open-source server implementations.
MatSync
Business & Operations
Club management software for martial arts academies, dojos and gyms. Owners manage members, family accounts, recurring Stripe billing, class schedules and belt progression in a web dashboard, while members book classes, check in and pay in native iOS and Android apps. Free for up to 30 students.
Free planEnglish UI
Mealie
Daily Life & Utilities
A self-hosted recipe manager and meal planner that can import recipes from URLs and build shopping lists.
Japanese UIEnglish UIIndie
Memos
Daily Life & Utilities
A free open-source self-hosted note-taking app. It keeps everyday notes in a personal timeline with Markdown and tags.
Free planJapanese UIEnglish UI
Mermaid Live Editor
Web Services & Online Tools
An online editor that previews Mermaid flowcharts, sequence diagrams and more in real time, with SVG export and shareable links.
English UI
Mery
Daily Life & Utilities
A lightweight text editor for Windows that can be extended with macros and color themes.
Japanese UIIndie
Mihon
Mobile Apps
An Android reader for manga, webtoons and comics. Sources are added through extensions, and reading progress can be tracked with MyAnimeList, AniList and others.
Japanese UIEnglish UI
Mindustry
Games & Entertainment
A sandbox tower-defense game where you build factories to process materials and defend your base against enemy waves, with multiplayer servers.
Free planJapanese UI
Misskey
Social & Communication
Free open-source software for building social networking services, with ActivityPub support for Fediverse federation. It has a responsive web UI and PWA support.
Free planAIJapanese UIIndie
Mixxx
Video, Audio & Music
Free open-source DJ mixing software developed by an international community of DJs, programmers and artists.
Japanese UIEnglish UI
Mochi
Education & Learning
A spaced-repetition flashcard app that doubles as a Markdown note tool. It is local-first and supports LaTeX plus language-learning aids such as dictionaries and text-to-speech.
Free planAI
MoneyCoach
Mobile Apps
MoneyCoach is a budgeting and personal finance app from MoneyCoach UG in Berlin, native on iPhone, iPad, Mac and Apple Watch. Plan category budgets with rollover, see upcoming bills and subscriptions, track goals and net worth, and import Apple Pay transactions via Shortcuts. Bank sync for supported US and European banks. Free download with a trial, then a subscription.
AIJapanese UIEnglish UI
Monkeytype
Education & Learning
A minimalistic, customizable typing test website with many test modes and an account system that stores speed and accuracy history.
MoodPalz
Health & Fitness
An iPhone wellness app for mood check-ins, journaling, guided breathing, grounding and reflecting on thought loops. MoodPalz Pro is a subscription with a trial. It is not medical care, therapy or a crisis service.
AIEnglish UIIndie
Mumble
Social & Communication
A free, open-source, low-latency, high-quality voice chat application.
Japanese UIEnglish UI
Necromancer: Undead Legion RPG
Games & Entertainment
An upcoming dark fantasy action RPG for Android and iOS. Raise fallen enemies to fight beside you, or detonate their corpses to clear a crowd. Move, attack and teleport while commanding 36 types of undead. Google Play pre-registration and App Store pre-order are available in supported regions.
Japanese UIEnglish UI
NewPipe
Mobile Apps
A free open-source YouTube client for Android designed to avoid ads and unnecessary permissions, with downloads, background play and a popup player.
Free planJapanese UIEnglish UI
ntfy
Web Services & Online Tools
An HTTP-based pub-sub notification service that sends push notifications to phones and desktops via PUT/POST. It can be used without sign-up and is open source.
Free planJapanese UIEnglish UIIndie
OBS Studio
Video, Audio & Music
Free and open-source software for video recording and live streaming, supporting Twitch, YouTube and other providers.
Japanese UIEnglish UI
Obsidian
Business & Operations
A note-taking app that is free for personal use, with paid add-ons for Sync and Publish.
Free planJapanese UIEnglish UI
Obtainium
Mobile Apps
An Android app that installs and updates apps directly from their release pages such as GitHub and F-Droid, and notifies you of new releases.
Japanese UIEnglish UI
Ollama
AI & Generative AI
An open-source tool for running open AI models locally or in the cloud. It provides a CLI, a REST API and Python and JavaScript libraries.
Free planAI
Ollie
WordPress (plugins & themes)
A block theme with over 50 patterns and a customizable design system through Global Styles.
Free plan
Online HEIC Convert
Image, Photo & Design
Convert HEIC photos to JPG, PNG or WebP, or arrange photos into a PDF. The free browser tool processes selected photo bytes locally and requires no account.
Free planEnglish UIIndie
Online Lesson Booking
WordPress (plugins & themes)
A scheduler and booking form for one-on-one online lessons, with email notifications for bookings and cancellations.
Free planJapanese UI
OnlineLah
Business & Operations
OnlineLah gives WhatsApp-led small businesses a shareable shop page to showcase products or services and receive customer enquiries directly.
Free planEnglish UI
Open WebUI
AI & Generative AI
A self-hosted, extensible web platform for interacting with AI models via Ollama or OpenAI-compatible APIs, designed to run fully offline.
Free planAIJapanese UIEnglish UI
OpenUtau
Video, Audio & Music
An open-source singing synthesis platform described as a UTAU successor, which can work with engines such as DiffSinger.
Japanese UIEnglish UI
Organic Maps
Mobile Apps
An offline maps and navigation app built on OpenStreetMap data. The official site says it has no ads or tracking and is free.
Free planJapanese UI
Paperless-ngx
Daily Life & Utilities
A community-supported document management system for scanning, indexing and archiving documents.
Japanese UIEnglish UI
Papers, Please
Games & Entertainment
A game in which you play a border inspector in the communist state of Arstotzka, deciding who may enter by checking documents.
Japanese UI
PassportPhoto.app
Image, Photo & Design
PassportPhoto.app is a free browser tool that crops and prepares passport, visa and other ID photos to official sizes. Everything is processed on your device, and your photos are never uploaded to a server. No account, no watermark. Supports the sizes of many countries, including the US, UK, Schengen, China and Japan.
Free planJapanese UIEnglish UI
Penpot
Image, Photo & Design
An open-source design platform for teams, available as a hosted app or self-hosted, with an MCP server that lets AI agents work in it.
Free planAIJapanese UIEnglish UI
Photopea
Image, Photo & Design
A browser-based photo and image editor that opens PSD and 40+ other formats and says files are processed locally on the device.
AI
Pi-hole
Security & Privacy
Network-wide ad and tracker blocking software. The official site says that once installed it covers every connected device, including phones and smart TVs.
Indie
Pinta
Image, Photo & Design
A free, open-source painting and image editing program built around simplicity, available on Linux, Mac, Windows and BSD according to its official site.
Free planJapanese UIEnglish UI
Pinumo
Image, Photo & Design
Screenshot and PDF utility for Chrome, Edge, and Windows: full-page or region capture, batch save, joining, annotation, local OCR, and free A4 PDF export.
Free planEnglish UI
Pixelfed
Social & Communication
A free and open-source decentralized photo-sharing social media platform. The official site credits Dansup as the creator.
Japanese UIEnglish UI
Pixelorama
Image, Photo & Design
An open-source pixel art editor for sprites, tiles and animations, running on Windows, Linux, macOS and the web.
Japanese UIEnglish UI
Plane
Business & Operations
A project and knowledge management platform covering work items, cycles and a wiki. It is available as a cloud service or self-hosted via Docker or Kubernetes.
AIJapanese UIEnglish UI
Plausible Analytics
Web Services & Online Tools
A privacy-friendly, lightweight alternative to Google Analytics, with no cookies or cookie banners. It offers a 30-day free trial without a credit card.
Indie
Pochipp
WordPress (plugins & themes)
Search products on Amazon and Rakuten and manage affiliate links from within WordPress.
Free planJapanese UI
Prelulu
AI & Generative AI
Prelulu lets you have a live, face-to-face video call with an AI character, rendered in real time by Prelulu's own avatar model, and you can interrupt it mid-sentence like a person. Roleplay and story scenes are live, and you can create your own characters. Works on web, iOS and Android. Pricing: welcome credits cover a short first call, free daily text, then credits.
Free planAIJapanese UIEnglish UI
PrivacyPhoto
Image, Photo & Design
A browser-based tool for inspecting and removing GPS and other Exif data from photos; the page states photos are not sent to any server.
Japanese UI
PrivateBin
Web Services & Online Tools
A minimalist open-source pastebin that encrypts in the browser so the server cannot read stored content. It supports passwords, expiry and burn-after-reading.
Japanese UIEnglish UI
Pyxel
Programming & Dev Tools
A retro game engine for Python.
Pz-LinkCard
WordPress (plugins & themes)
Displays links as blog cards via a shortcode, with appearance options in the settings screen.
Free planJapanese UIEnglish UI
Rams
WordPress (plugins & themes)
A clean, minimalist responsive theme for bloggers.
Free planJapanese UI
Readeck
Daily Life & Utilities
An app for saving interesting articles, long reads, pictures and videos to read or revisit later.
Redstone Markets
Finance & Budgeting
Free return and risk analytics for about 2,900 US stocks and 1,200 ETFs.
Free planEnglish UI
ResoCat
Mobile Apps
Tired of changing display settings every time you open a game? ResoCat saves Android resolution and DPI per app and applies them automatically on launch. Prepare display-setting permission via Shizuku or ADB, allow usage access, then save your default settings. Try a profile with a slightly lower resolution that keeps the aspect ratio and assign it to a game. When you leave the game, your saved defaults are restored. The effect on in-game rendering resolution and frame rate varies by device and game. Search for "ResoCat" on Google Play.
Free planJapanese UIEnglish UIIndie
Riff（リフ）
AI & Generative AI
Riff is a free extension for Chrome, Brave and Edge. Chat in its dedicated tab, Riff Home, and write replies and posts in a side panel on X, LinkedIn, Threads, Facebook, Instagram, YouTube, and on the web versions of Slack and Teams. All models run on your computer, and Riff never posts for you. No server, no API key, no monthly fee. Gemini Nano writes in 5 languages, Gemma 4 in 16.
Free planAIJapanese UIEnglish UI
Round: Workout Video Timer
Health & Fitness
Film your own workout or an athlete you coach, then export an MP4 with the timer and round labels in the picture. Paid iPhone and iPad app: £2.99 once in the UK, with regional pricing and no subscription. Support: https://recordwithround.com/support Privacy: https://recordwithround.com/privacy
English UI
RSSHub
Web Services & Online Tools
An open-source project that generates RSS feeds for sites that lack them, with many routes and public instances. The docs state it is released under AGPL-3.0.
ScreenLux: Live Wallpapers 4K
Image, Photo & Design
ScreenLux: original generative-AI phone wallpapers that move, with live wallpapers on iOS and 4K video wallpapers on Android (works on Samsung One UI 8.5). Free to download and preview; subscription unlocks the full catalog and removes ads.
Free planAIEnglish UI
sd-scripts
AI & Generative AI
A collection of training, generation and utility scripts for Stable Diffusion and other image generation models, covering LoRA training and fine-tuning. Japanese versions of the README and docs are provided.
Free planAIJapanese UIIndie
Secretlint
Security & Privacy
A pluggable linter that prevents credentials from being committed. It scans a project for secrets and can run as a pre-commit hook.
Free planIndie
Shaarli
Web Services & Online Tools
A self-hosted, single-user bookmark manager and link-sharing service that stores links in a file without a database. It supports tags, RSS/ATOM feeds and plugins.
Japanese UIEnglish UI
SHAREVOX
AI & Generative AI
A free text-to-speech app that uses deep-learning speech synthesis. The official site says users can adjust intonation and speed in detail and create a voice from their own recording.
Free planAIJapanese UI
shitate
WordPress (plugins & themes)
A block theme for corporate sites where choosing one of eight type-scale ratios in the Customizer sets heading and body sizes.
Free plan
Shotcut
Video, Audio & Music
A free, open-source, cross-platform video editor; Shotcut is a trademark of Meltytech, LLC.
Japanese UIEnglish UI
Simple Days
WordPress (plugins & themes)
A free responsive blog theme designed mobile-first.
Free planJapanese UI
SimpleX Chat
Social & Communication
A private messenger that uses no user identifiers, not even random ones. Connections are made via link or QR code for messages and calls, per the official site.
Japanese UIEnglish UI
Skill Rivals
Games & Entertainment
Skill Rivals is a browser-based gaming platform for competing in skill challenges, measuring results, and comparing performance on leaderboards.
Free planEnglish UI
Smalruby
Education & Learning
A programming learning environment, modelled on Scratch, where children build programs and robots with Ruby. It is developed by the NPO Ruby Programming Shounendan.
Japanese UI
Sonari: MIDI Controller
Video, Audio & Music
Sonari turns hand gestures into an expressive musical instrument on Apple silicon Mac. Play built-in sounds, shape visuals that respond to music, or send MIDI, MPE and OSC to compatible DAWs and music software. Includes a complete 14-day trial, then a one-time purchase. Requires macOS 26 or later.
English UIIndie
Sonic Pi
Education & Learning
A free open-source tool for making and performing music by writing code. The official site says it runs in the browser and also ships as apps for Windows, macOS and Linux.
Free planJapanese UIEnglish UI
Sosiale Moments
Social & Communication
Sosiale Moments helps adults arrange a short activity with someone nearby. Propose a time and a public meeting place, or join an open plan. Use private chat to coordinate after joining. Ages 18+. Eligible new members can try it for one month. Membership then renews at the displayed monthly price until cancelled. Try planning a coffee or a walk this week.
English UI
Stardew Valley
Games & Entertainment
A farming life sim where you inherit your grandfather's farm. You grow crops, raise animals, fish, befriend townsfolk and explore caves.
Japanese UI
Stirling PDF
Daily Life & Utilities
A PDF tool you run on your own machine or server for editing, converting, OCR and redaction; free for individual use.
Free planAIJapanese UIEnglish UI
Stoat
Social & Communication
An open-source group chat app for friends and communities with servers, channels, voice chat and file sharing. The official site states there are no ads or data mining.
Japanese UIEnglish UI
Stocha
Mobile Apps
A photo organizer app for tidying photos on the device. The developer's site says it is designed with privacy as the top priority and has no external data communication.
Indie
Style-Bert-VITS2
AI & Generative AI
Text-to-speech software based on Bert-VITS2 that generates emotional speech, with controllable emotion and speaking styles.
AIJapanese UI
Subway Tooter
Mobile Apps
A Mastodon client for Android phones and tablets. It features simultaneous multiple accounts, rearrangeable multi-column views and extensive filters.
Japanese UI
Suite.coffee
Business & Operations
Suite.coffee is a catalogue of simple, connectable business apps for small businesses: appointment booking, invoices, time clock, customers, inventory, restaurant and accommodation bookings, support tickets, checklists, feedback and event attendance. Each app does one job, runs in the browser and on mobile, and can be started for free.
Free planJapanese UIEnglish UI
Surge XT
Video, Audio & Music
An open-source digital subtractive-hybrid synthesizer with two scenes per patch, available as VST3, CLAP, AU and LV2.
Suzaku(朱雀)
Security & Privacy
A Rust threat-hunting and fast forensics timeline generator for cloud logs such as AWS CloudTrail, Azure/Entra ID/M365 and Google Workspace, with native Sigma support.
Japanese UI
Tablacus Explorer
Daily Life & Utilities
A tabbed, Explorer-compatible file manager for Windows that is extensible with add-ons and runs portably without installation.
Japanese UI
Takajo(鷹匠)
Security & Privacy
A fast forensics analyzer for Hayabusa results, written in Nim. It can extract indicators, build timelines and process trees, and generate HTML reports.
Japanese UI
Tandoor
Daily Life & Utilities
An open-source recipe manager, described on its official site as smart recipe management.
Japanese UIEnglish UI
Taski
Business & Operations
A team issue tracker that shows the same issues as list, board, Gantt and calendar views, with import from Redmine and Trello.
Free planAIJapanese UI
Tatoeba
Education & Learning
A collaborative multilingual sentence collection with translations, useful for finding example sentences when learning languages; it has a Japanese interface.
Free planJapanese UI
tbls
Programming & Dev Tools
A CI-friendly tool, written in Go, that documents a database. The repository describes it as generating documentation from schema information.
Free planIndie
Tera Term
Programming & Dev Tools
An open-source terminal emulator with an SSH module (TTSSH). Japanese manuals and language files for localizing menus are provided.
Japanese UI
Termux
Mobile Apps
A terminal emulator and Linux environment app for Android. It works without rooting or setup, and extra packages are installed with APT.
Text to Video
Video, Audio & Music
An AI video generation web service that turns text prompts into finished clips. Choose from 30+ models including Seedance, Kling, Veo 3 and Sora 2, with image-to-video and video-to-video conversion, AI avatars and lip sync in 17+ languages. Free credits to start; available in Japanese and English.
Free planAIJapanese UIEnglish UI
textlint
Programming & Dev Tools
A pluggable linter for natural-language text. Rules are added via npm, and it can check Markdown and plain text from the CLI with partial auto-fix.
Free planIndie
The Odin Project
Education & Learning
A free, open-source coding curriculum that can be taken entirely online. It offers a roadmap to full-stack development with hands-on projects and is maintained by volunteers.
Free planEnglish UIIndie
TheDesk
Social & Communication
A desktop client for Mastodon (and Misskey) with a multi-column timeline layout. The official site says v25 onward is a modified version of Fedistar.
Japanese UIIndie
This Pic Can Change (这图能改)
Image, Photo & Design
An iOS 17+ photo and video utility from indie studio HugeHard Studio: compress images to an exact file size and convert videos into Live Photos, plus video compression, video to GIF, format conversion, resizing and widgets. Ordinary processing runs on device with no upload. Optional AI features use a provider you configure. Currently in TestFlight public beta.
AIIndie
Thought Pocket
Mobile Apps
Thought Pocket gives small ideas a place to land. Choose a category, type a thought or use optional voice input, and save it. Later you can search your ideas, edit them, move them to another category, and create your own categories. Saved ideas stay on your device, with no account or cloud sync. Voice input uses your device's speech recognition, which may process audio online depending on its settings. One-time purchase with no ads or subscription.
English UI
tide736.net
Daily Life & Utilities
A site offering tide tables for 736 ports along the Japanese coast, plus a tide calendar and API. It states it does not replace the official tide tables of the Japan Coast Guard.
Japanese UIIndie
Timberborn
Games & Entertainment
A city-building sandbox starring beavers, set in a world struck by drought and toxic waste, with vertical architecture and water physics.
Japanese UI
Tinker: Laser Puzzles
Games & Entertainment
Rotate mirrors, split beams and use portals to power a tower. All 340 puzzles are free to play, with optional purchases for hints and supplies.
Free planJapanese UIEnglish UI
ToText: AI transcription for iPhone by Lovelace Loom
Video, Audio & Music
ToText aims to verify the content without having to listen to the recording again. It can transcribe and summarize recordings or audio files and even ask questions about them. It also comes with a voice input keyboard and supports 60 languages, which can be selected manually or automatically detected. Transcription is done in the cloud on Lovelace Loom's iPhone iOS app.
Free planAIJapanese UIEnglish UIIndie
Transcribe Video: To The Text
Video, Audio & Music
iPhone app that turns video/audio files, YouTube/Vimeo links and live voice recordings into editable transcripts in 51 languages, with speaker separation, AI summaries and TXT/DOCX export.
English UIIndie
Transparent Laden
Travel, Maps & Transit
Find a public EV charger before you set off. The dark-green outline marks the lowest displayed price per kWh among available chargers that can be started in the app in the visible map area. Free download for Android and iPhone. The regular charging subscription is €2.99/month and can be cancelled monthly. Charging costs are billed separately. German and English.
English UI
TryAnyOutfit
AI & Generative AI
AI virtual try-on app for iPhone, iPad and Android.
AIJapanese UIEnglish UI
Tusky
Mobile Apps
A lightweight Android client for Mastodon supporting photos, videos, lists and custom emojis. It is free and open source.
Free planJapanese UIEnglish UI
Tux Paint
Education & Learning
A free drawing program for children aged 3 to 12. The official site states it has no ads, is open source under the GPL and is built by a worldwide volunteer team.
Free planJapanese UIIndie
Twenty
Business & Operations
An open-source CRM with custom objects, fields, views and no-code workflows, available self-hosted or as a managed cloud.
AIJapanese UIEnglish UI
uBlock Origin
Security & Privacy
An open-source, efficient content/ad blocker extension for Chromium and Firefox, as described in its GitHub repository.
Japanese UIEnglish UIIndie
UGTOP
Web Services & Online Tools
A Japanese-language site that publishes tools such as the "Kakunin-kun" environment checker. Its copyright notice reads "1997- ugtop".
Japanese UI
Umami
Web Services & Online Tools
An open-source web and product analytics platform that the official site says uses no cookies and collects no personal data. It covers custom events, funnels, session replay and more.
Japanese UIEnglish UI
UNDERTALE
Games & Entertainment
An RPG introduced on its official site as one where you do not have to destroy anyone.
Japanese UI
Upscayl
Image, Photo & Design
A free, open-source AI image upscaler for Linux, macOS and Windows, according to its official site.
AIJapanese UIEnglish UI
Uptime Kuma
Programming & Dev Tools
An easy-to-use self-hosted monitoring tool. It monitors HTTP(s), TCP, ping, DNS and Docker containers and sends notifications to many services.
Free planJapanese UIEnglish UI
UTAU
Video, Audio & Music
A singing voice synthesis tool. The official download page distributes a Windows installer and publishes a version history.
Japanese UI
Vampire Survivors
Games & Entertainment
A gothic-horror roguelite survival game where you fight hordes of monsters until dawn.
Japanese UI
Vaultwarden
Security & Privacy
An unofficial self-hostable server written in Rust that implements the Bitwarden client API. The README states it is not associated with Bitwarden, Inc.
VCV Rack
Video, Audio & Music
A Eurorack modular synthesizer simulator for Windows, Mac and Linux. The official site lists Rack 2 as available now.
Veloren
Games & Entertainment
An action-adventure RPG set in a vast fantasy world, with cave mining, animal taming and multiplayer. The source code is public.
Japanese UIEnglish UI
Velto
Mobile Apps
Velto is a privacy-first GLP-1 treatment tracker for iPhone and iPad, made in Berlin. Log injections or pills with your dose and a custom 3-30 day interval, plus weight, meals, side effects, mood, water and steps on one timeline. No account, no ads, CSV export; English, German and Italian. Free download with optional Premium. A tracking tool, not a medical device.
AIEnglish UIIndie
VeraCrypt
Security & Privacy
Free open-source disk encryption software. The official site highlights strong security.
Japanese UIEnglish UI
Vikunja
Business & Operations
An open-source, self-hostable task manager with list, kanban, Gantt and table views.
Free planJapanese UIEnglish UI
Vivliostyle
Web Services & Online Tools
An open-source CSS typesetting project for digital and web publishing. The site is available in Japanese and English, and a CLI is provided.
Japanese UI
Voicepaper
Mobile Apps
A text-to-speech app for iPhone, iPad and Android. Import PDFs, EPUBs, web articles and photos and listen; the English page says it is free and has no ads.
Free planAIJapanese UIEnglish UIIndie
VOICEVOX
Video, Audio & Music
Free text-to-speech and singing voice synthesis software; the page states it is free for commercial and non-commercial use subject to each character's terms.
Free planJapanese UI
waifu2x
Image, Photo & Design
A web service that upscales and denoises anime-style art and photos using deep convolutional neural networks, with a 20-language interface.
AIJapanese UIIndie
wallabag
Web Services & Online Tools
A free, open-source, self-hostable read-it-later app that stores articles in your own archive. It supports imports from Pocket and others, plus apps and browser extensions.
Japanese UIEnglish UI
WaniKani
Education & Learning
A web app that teaches kanji and vocabulary through mnemonics and spaced repetition, made by Tofugu.
English UI
WatchLux Watch Faces
Mobile Apps
WatchLux: animated watch faces in original generative-AI art. Most watch faces are static; these move, as video faces on Apple Watch and animated faces on Wear OS. Free to download and preview; subscription unlocks the full catalog and removes ads.
Free planAIJapanese UIEnglish UI
WealthScout
Daily Life & Utilities
Net worth tracker and financial planning app for households
Free planAIEnglish UI
Whalebird
Social & Communication
A desktop client for the Fediverse supporting Mastodon and other services, with account switching and streaming timelines.
Free planJapanese UIEnglish UIIndie
WOLF RPGエディター(ウディタ)
Games & Entertainment
A free RPG-making tool driven by Japanese-language commands. The official site says games made with it may be freely distributed, sold or submitted to contests.
Free planJapanese UIIndie
Word Balloon
WordPress (plugins & themes)
Adds speech balloons to posts. Supports both the block and classic editors and ships with a Japanese translation.
Free planJapanese UI
XO Security
WordPress (plugins & themes)
Strengthens login security with a login log, attempt limits, captcha, login URL change and two-factor options.
Free planJapanese UI
Yes/No Chart
WordPress (plugins & themes)
Lets you create a yes/no question flow (a yes/no chart) on a WordPress site.
Free planJapanese UI
Yomitan
Education & Learning
A free browser extension that shows dictionary popups on hover and can send lookups to Anki; successor to Yomichan.
Zenn
Web Services & Online Tools
A knowledge-sharing community for engineers where users can publish articles and books. Its tagline is 'Write for yourself.'
Japanese UI
Zeny
Mobile Apps
A simple money tracker for logging expenses in a few taps, with history, a calendar and charts. The site says it is free forever with no sign-up.
Free planJapanese UIEnglish UIIndie
ZLogin
Security & Privacy
An anti-detect desktop browser for securely managing multiple accounts on a single device. Each profile runs in an isolated browser environment with its own fingerprint and proxy settings, preventing account linking and bans. Team permission management and no-code RPA automation included. Available for Windows, macOS and Linux, with a free plan.
Free planEnglish UI
Zotero
Education & Learning
A research tool for collecting, organizing, annotating and citing sources, developed by a nonprofit and free to use.
Free planJapanese UIEnglish UI
Zulip
Social & Communication
An open-source team chat application for distributed teams, described on its official site as organized team chat.
Japanese UIEnglish UI
アサリツールズ (Asari Tools)
Web Services & Online Tools
A free collection of web tools for streamlining web work, including text formatting, image conversion and SEO analysis, run by Studio Asari LLC in Nagoya.
Free planJapanese UI
サクラエディタ (Sakura Editor)
Programming & Dev Tools
A free text editor for Windows with a Japanese-language focus. Its source code is published on GitHub.
Free planJapanese UI
ティラノスクリプト
Games & Entertainment
A free tool for making visual novel games. Games can be published for PC, smartphones and browsers, and the official site says commercial use has no restrictions.
Free planJapanese UI
ドットインストール (dotinstall)
Education & Learning
A programming learning service built on videos of three minutes or less. Its top page lists 578 lessons and 8,635 videos, and it is run by dotinstall Inc. in Meguro, Tokyo.
Free planJapanese UI
ドリトル (Dolittle)
Education & Learning
A programming language designed for education. The official site says it is used in textbooks and supplementary materials for junior and senior high schools and in classes from elementary school to university.
Japanese UI
なでしこ3 (Nadesiko3)
Education & Learning
An open-source programming language in which programs are written in Japanese, aimed at automation and learning to program. A web version and a PC (Go) version are available.
Free planJapanese UI
ビスケット (Viscuit)
Education & Learning
A visual programming language for kids built around a single concept, the glasses, to make pictures move and react.
Japanese UI
ポイピク (Poipiku)
Image, Photo & Design
A Japanese web service for posting and managing illustrations. It supports uploading up to 200 images at once and anonymous emoji reactions.
Japanese UI
ゆっくりMovieMaker4
Video, Audio & Music
A video editor for yukkuri-style commentary videos, offering video export, template features and support for many speech-synthesis tools and services.
Free planJapanese UIIndie
ゆめにっき (Yume Nikki)
Games & Entertainment
A walking-style adventure set in a dreamlike world with no set story or objectives.
Japanese UI
青空文庫
Web Services & Online Tools
An online digital library in Japanese. Works can be browsed by author and title, and usage rules are explained on the site.
Japanese UI