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.
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Listed apps
See all apps →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
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 plan
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 planAI
KantanProEX（DT）
Business & Operations
個人事業主・フリーランス・小規模ビジネス向けの販売管理アプリです。顧客・受注・請求・サービス・協力会社・レポートをひとつの画面で管理でき、見積書や請求書の作成・印刷・PDF出力に対応します。Mac／Windowsのパソコンの中だけで動き、データはインターネット上に置きません。サブスクなしの買い切りで、無料でダウンロードして最初の30日は全機能を試せます。
Free planAIJapanese UI
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 plan
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
Obsidian
Business & Operations
A note-taking app that is free for personal use, with paid add-ons for Sync and Publish.
Free plan
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
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 planAI
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
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
The APP NAVI promise
Unknown means "Unverified"
We never fill gaps by guessing. Every app carries a checked-on date and source URLs.
Japanese support, stated clearly
Overseas apps are included — and whether they work in Japanese is always a field.
Queryable by AI
The same content as the human pages is available as JSON, Markdown, and MCP.
Facts vs. editorial, kept apart
What we verified from official sources is never mixed with editor opinion.
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