SiYuan

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

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

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

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

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.

Structured personal knowledge base, inspired by zettlekasten and org-mode.