List of Top Free Open Source & Self Hosted Application for Knowledge Management Tools

Knowledge management is the collection of methods relating to creating, sharing, using and managing the knowledge and information.

Atomic Server – Knowledge graph database with documents (similar to Notion), tables, search, and a powerful linked data API. Lightweight, very fast and no runtime dependencies. (Demo) MIT Docker/Rust
Mindmaps – Open source, offline capable, mind mapping application. AGPL-3.0 HTML5
My Mind – Web application for creating and managing mind maps. MIT Javascript
TeamMapper – Host and create your own mindmaps. Share your mindmap sessions with your team and collaborate live on mindmaps. MIT Docker/Nodejs