SiYuan

Collaborative note taking, wiki and documentation platform that scales.

Markdown note-taking app with plain-file storage, graph view, and MCP integration (alternative to Obsidian, Notion).

Tool for indexing large amounts of both documents (PDF, Word, HTML) and structured (CSV, XLS, SQL) data for easy browsing and search. It is built with investigative reporting as a primary use case.

Knowledge graph database with documents (similar to Notion), tables, search, and a powerful linked data API. Lightweight, very fast and no runtime dependencies.

Data catalog for discovering and organizing data assets across your stack, including databases, APIs, message queues, and pipelines.

Host and create your own mindmaps. Share your mindmap sessions with your team and collaborate live on mindmaps.