Luckysheet

ProductivityMITFreeWeb

Web-based collaborative spreadsheet with Excel-compatible features and real-time editing support

GitHub stars

Google Sheets

Productivity

No-code database platform with spreadsheet interface, forms, and API for building applications

Open-source to-do and task management app with lists, kanban, Gantt charts, and calendar

Hierarchical note-taking application with rich text editing, scripting, and knowledge graph visualization

Privacy-first knowledge management tool with outliner, graph view, and bidirectional linking

End-to-end encrypted collaboration suite with documents, spreadsheets, presentations, and kanban boards

Local-first personal knowledge management tool with object-based structure and peer-to-peer sync