Open Source Personal Knowledge Management (PKM) Tools using Babel
A curated collection of the best open source tools for organizing personal information and building knowledge graphs. using Babel.
Encrypted note-taking that syncs across all your devices
Stars
56,577Last commit
5 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
45,117Last commit
5 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
14,710Last commit
14 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
68Last commit
8 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:
Sent – A unified API for sending messages across SMS, RCS, and apps like WhatsApp.
Sent