A lightweight, self-hosted memo/notes app built in Rust. Minimal resource usage (5–10MB idle RAM, max 100MB). Uses SQLite, HTMX, Docker-ready. MIT licensed, 4 stars.
Open-source, self-hostable markdown team wiki with a built-in MCP server — so AI agents read, write, and search your docs as first-class teammates. Live multiplayer, semantic + full-text search. Go + PostgreSQL + React/Milkdown.
Fully-featured team and group chat with voice/video calls, screen sharing, and end-to-end encryption. Self-hosted, Go backend + Svelte frontend. AGPL-3.0, 2k stars.