Open Source Personal Knowledge Management (PKM) Tools using C
A curated collection of the best open source tools for organizing personal information and building knowledge graphs. using C.
AI workspace for docs, projects, and wikis you control
Stars
77,681Last commit
3 days agoLicense
AGPL-3.0
Open source collaborative workspace combining notes, databases, and AI with full data ownership, offline support, and self-hosting options.
Open Source Alternative to:
Encrypted note-taking that syncs across all your devices
Stars
56,850Last commit
10 hours agoLicense
Unknown
Cross-platform note-taking app with end-to-end encryption, Markdown support, web clipping, and sync via Dropbox, OneDrive, or Joplin Cloud.
Open Source Alternative to:
Privacy-first knowledge base that connects your notes
Stars
45,347Last commit
9 hours agoLicense
AGPL-3.0
Local-first, open-source knowledge management tool with bidirectional linking, outlines, flashcards, PDF annotations, and whiteboards for building a connected second brain.
Open Source Alternative to:
Zero-knowledge encrypted notes that sync across all devices
Stars
14,820Last commit
19 hours agoLicense
GPL-3.0
End-to-end encrypted note-taking app with zero-knowledge architecture, cross-device sync, web clipper, and a self-hostable sync server.
Open Source Alternative to:
Privacy-focused note-taking made simple and fast
Stars
67Last commit
9 months agoLicense
GPL-2.0
Justnote is a secure note-taking app that lets you easily create and sync notes across devices while maintaining full control of your data.
Open Source Alternative to:
Postiz – The All-in-One agentic social media scheduling tool
Postiz