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.
Scratch – A minimalist markdown scratchpad
An offline-first, open source markdown note-taking app. No cloud, no account, no subscriptions.
mdnb — A Markdown Notebook for macOS
A native macOS notebook app. Your notes are plain Markdown files on disk, yours forever. Free.
Peersky Browser (@peersky@mastodon.social)
Attached: 1 image 📝 v1.0.0-beta.20 — Introducing P2PMD A real-time peer-to-peer Markdown editor for notes and collaboration that syncs directly between peers, with no servers in the middle. Release: https://github.com/p2plabsxyz/peersky-browser/releases/tag/v1.0.0-beta.20 #PeerSky #p2pmd #markdown
HelixNotes | Local Markdown Notes
A local markdown note-taking app. Plain .md files on your disk. Sync them your way, or don't.
A Markdown Editor on AT Protocol — Diffdown
Diffdown — collaborative markdown editing on AT Protocol.
HackMD: Your Collaborative Markdown Workspace for Knowledge Sharing
HackMD gives you a real-time Markdown editor for collaborative work. Working with Markdown files in HackMD is simple, straightforward, and fun.
socialde.pt/atproto.md
Markdown-first API for the AT Protocol ecosystem, built for LLM agents and tools that consume plain text.
Marker
Marker is an open-source, user-friendly UI for writing & editing markdown files. Everything you create lives in your filesystem.
Treehouse: Note-taking Frontend
An open source note-taking frontend to extend and customize. Bring your own backend or configure a built-in backend to get started.
Note-ifying all the things (with Boris Mann)
Conversation about note-taking, the overwhelm of tools, and future possibilities. (shortlink:…
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 …
iA Writer: The Benchmark of Markdown Writing Apps
Plain text. Total focus. The Industry standard Markdown text editor. Available for Mac, iPhone, iPad, Android, and Windows. Download it now, try it for free
Note taking apps
Notes, Outliners, Markdown Editors, PKMs, Memexs, Second Brains, Commonplace books, and more
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