Developer ToolsHeynote
A free, open-source dedicated scratchpad for developers with block-based editing, syntax highlighting and a built-in math/calculator engine.
Developer Tools
ProductivityLogseq
A privacy-first, open-source outliner and knowledge base with bidirectional links, daily journals and a built-in graph view.
ProductivityAnytype
Local-first, end-to-end encrypted Notion alternative with peer-to-peer sync
ProductivityJoplin
Open-source, end-to-end encrypted note-taking that runs on every platform you own.
ProductivityHeptabase
Visual, card-based knowledge base for students, researchers, and lifelong learners
ProductivityTana
AI-native workspace built around a self-organizing supertag knowledge graph.
ProductivityTrilium Notes
Open-source hierarchical knowledge base that scales to 100,000+ notes — local, private, and free forever.