TriliumNext Notes is an self-hosted note-taking and knowledge management application, successor to Trilium. It stands out for its unlimited tree structure: you can structure thousands of notes into deep hierarchies, clone the same note in multiple places, and create relationships between them.

Its editor is very comprehensive: rich text, color-coded code blocks, tables, sketches, mind maps, "book" notes… The application also handles attributes and relationships to qualify notes, powerful search, version history, and the ability to encrypt sensitive notes.

For advanced users, TriliumNext offers scripts and an API to automate processes, a cross-platform desktop client synchronized with web access, and simple Docker deployment. It is the ideal tool for building a personal or team knowledge base that you fully control.