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Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative.

A personal timeline for quick notes. Write short memos, find them later by search, tag, or date. Open source and self-hosted.

Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS.

An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together 开源、隐私优先、自托管的知识工作空间，让人与智能体在此协作

A privacy-first, open-source platform for knowledge management and collaboration. Download link: http://github.com/logseq/logseq/releases. roadmap: https://logseq.io/p/NX4mc_ggEV

An Open Source implementation of Notebook LM with more flexibility and features

Build your personal knowledge base with Trilium Notes

A personal knowledge management and sharing system for VSCode

Self-organizing AI second brain for Obsidian + Claude Code. Drop any source and Claude reads, links, and files it into one connected knowledge graph of plain Markdown you own. AI note-taking, personal knowledge management (PKM), and an open-source Notion alternative. Based on Karpathy's LLM Wiki pattern.

A fully open source & end-to-end encrypted note taking alternative to Evernote.

A pleasant note-taking platform in native C++.

Capture first. Organize later. A local-first Markdown app that turns scattered records into clear notes with AI.

Laverna is a JavaScript note taking application with Markdown editor and encryption support. Consider it like open source alternative to Evernote.

CLI and local web plain text note‑taking, bookmarking, and archiving with linking, tagging, filtering, search, Git versioning & syncing, Pandoc conversion, + more, in a single portable script.

Fast Markdown note-taking app for Mac and iPhone

📝 ‎ A web-based notes app for developers.

A free, open-source developer workspace. Snippets, notes, HTTP requests, calculations, and dev tools in one local-first app.

🔥 PlainApp is an open-source app that lets you securely manage your phone from a web browser. Access files, media, contacts, SMS, calls, and more through a simple, easy-to-use interface on your desktop.

Think fearlessly with end-to-end encrypted notes and files. For issues, visit https://standardnotes.com/forum or https://standardnotes.com/help.

The malleable knowledge base for you and your team. Powered by Markdown and Lua.

QOwnNotes is a plain-text file notepad and todo-list manager with Markdown support and Nextcloud / ownCloud integration.

TagSpaces is an offline, open source, document manager with tagging support

Browser extension to curate, annotate, and discuss the most valuable content and ideas on the web. As individuals, teams and communities.

Persistent memory for Claude Code and 6 other CLI agents, stored as plain markdown in your Obsidian vault. Stop re-explaining your projects, decisions and people every session. 45 commands: hybrid semantic search, self-rewriting notes, key-less web research, and scheduled agents that maintain the vault while you sleep.

Fast and beautiful note-taking app written in C++. Write down your thoughts.

Your web application for managing personal data.

A personal knowledge base that builds and maintains itself. Drop in sources — Claude (or Codex/Gemini) reads them, extracts knowledge, and maintains a persistent interlinked wiki. Works with Claude Code, Codex, OpenCode, Gemini CLI. No API key needed.

A self-hosted, database-less note taking web app that utilises a flat folder of markdown files for storage.

A simple command line notebook

Fractal Graph-of-Thought. Rhizomatic Mind-Mapping for Ai-Agents, Web-Links, Notes, and Code.