Top DIAGRAMS GitHub Repositories & Tools (2026)

Virtual whiteboard for sketching hand-drawn like diagrams

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

A Unicode canvas for humans and AI. Draw diagrams, interfaces, and slides as editable text.

Interactive architecture diagrams for codebases

The missing pieces for Unreal's PCG. Graph theory, advanced pathfinding, spatial ops, filtering, asset management, and more.

OpenCutList is a SketchUp Extension for automating the generation of cut lists for woodworking projects.

Generate diagrams from textual description

Lightweight Knowledge Base and Feed Reader.