ProductivityObsidian
Local-first, Markdown-native note-taking with a graph view and 2,000+ community plugins
Productivity
ProductivityAFFiNE
Open-source, local-first workspace that merges docs, whiteboard and databases into one hyper-fused canvas
ProductivityAnytype
Local-first, end-to-end encrypted Notion alternative with peer-to-peer sync
ProductivityOutline
The fastest open-source team knowledge base — markdown, realtime collab, and 20+ integrations.
ProductivityHeptabase
Visual, card-based knowledge base for students, researchers, and lifelong learners
ProductivityTrilium Notes
Open-source hierarchical knowledge base that scales to 100,000+ notes — local, private, and free forever.