







An open source note-taking frontend to extend and customize. Bring your own backend or configure a built-in backend to get started.
GitHub issues for notes
GitHub issues is almost the best notebook in the world. Free and unlimited, for both public and private notes. Comprehensive Markdown support, including syntax highlighting for almost any language. Plus …

Scratch – A minimalist markdown scratchpad
An offline-first, open source markdown note-taking app. No cloud, no account, no subscriptions.

Mustard
A browser extension that lets you annotate any webpage with notes and share them with your Bluesky and/or GitHub followers.

deepnote/deepnote
Deepnote is a drop-in replacement for Jupyter with an AI-first design, sleek UI, new blocks, and native data integrations. Use Python, R, and SQL locally in your favorite IDE, then scale to Deepnote cloud for real-time collaboration, Deepnote agent, and deployable data apps. https://deepnote.com/
Bluenotes
Bluesky with Community Notes. This a fully-featured clone of the main Bluesky frontend, but with Community Notes!

Curvenote Scientific Content Management System
A web-first experience that brings science and data to the surface. Enhance comprehension and maximize impact and reach of your research using rich metadata and interactive figures.
Reflect
A beautifully minimalist note-taking app designed to mirror the way you think. Now with a native AI integration.

outl — local-first markdown outliner & LLM second brain
Open-source bullet-point outliner. Plain markdown on disk (no UUIDs), peer-to-peer tree-CRDT sync that doesn't lose data when devices edit offline — your devices talk straight to each other, end-to-end encrypted, no cloud or third-party server holding your notes — and an MCP server so Claude, Cursor and ChatGPT use your notes as a second brain. A modern Roam, Logseq and Obsidian alternative built in Rust.

open-community-notes/004-labeling at master · johnwarden/open-community-notes
Community Notes on AT Protocol. Contribute to johnwarden/open-community-notes development by creating an account on GitHub.
Note-ifying all the things (with Boris Mann)
Conversation about note-taking, the overwhelm of tools, and future possibilities. (shortlink:…

open-community-notes/003-aids at master · johnwarden/open-community-notes
Community Notes on AT Protocol. Contribute to johnwarden/open-community-notes development by creating an account on GitHub.
Margin - Chrome Web Store
Annotate and highlight any webpage, with your notes saved to the decentralized AT Protocol.
Margin - Chrome Web Store
Annotate and highlight any webpage, with your notes saved to the decentralized AT Protocol.
Margin - Chrome Web Store
Annotate and highlight any webpage, with your notes saved to the decentralized AT Protocol.
Notesnook | Open source & zero knowledge private note taking app
Express yourself with freedom, no spying, no tracking — only private notes. Unlike Evernote and other note apps, your data is private — not open for everyone to see.

Knowledgebase Apps (by Boris) — Semble
Treehouse: Note-taking Frontend
cybersemics/em
Wiki (by Boris) — Semble
self-hostable notion replacements (by Tyler Lawson) — Semble

v2 Editor