Open source. Open possibilities.

draw.io is a configurable JavaScript-based client-side editor for general diagramming and whiteboarding.

FlowGram is an extensible workflow development framework providing built-in tools including canvas, form, variable management, and pre-built materials (like LLM, Condition, Code Editor). It enables developers to build custom AI workflow platforms with visual composition and integration capabilities.

An Agent Skills-compatible skill that turns natural language, code, Terraform/K8s, SQL, OpenAPI, AsyncAPI, Protobuf and GraphQL into editable, tested draw.io architecture diagrams with incremental sync, multi-view projection, drift diff, CI architecture tests, and interactive HTML/PPTX/Mermaid exports.

Unofficial VS Code extension integrating Draw.io (diagrams.net) for editing diagrams. Supports .drawio, .svg, and .png formats with embedded diagram data. Features include offline editing, multiple themes, LiveShare collaboration, code linking via symbol search, and experimental inline Markdown editing.

tldraw is an open-source React SDK for building infinite canvas apps, offering drawing/diagramming tools, self-hostable multiplayer sync, custom shapes/tools, and AI integration starter kits.

Diagrams is a Python library for creating cloud system architecture diagrams as code. It supports AWS, Azure, GCP, Kubernetes, and more, using Graphviz for rendering. Ideal for prototyping and documenting infrastructure designs.