✏️ Excalidraw

Virtual whiteboard with hand-drawn style diagrams. Perfect for sketching flows, architectures, mind maps, and UI ideas in a playful but clear way.

How you can contribute:

• Add new drawing tools or shapes
• Improve real-time collaboration experience
• Create new themes or export formats

Link: https://github.com/excalidraw/excalidraw

🎨 Penpot

Open-source design and prototyping tool similar to Figma. Built for design–dev collaboration, with web standards and self-hosting in mind.

How you can contribute:

• Enhance vector tools and editing capabilities
• Add or improve plugins
• Improve performance and refine core UI components

Link: https://github.com/penpot/penpot

🧩 ComfyUI

Node-based workflow system for advanced AI image and video generation. Lets you build complex generative pipelines visually by wiring together modular nodes.

How you can contribute:

• Build custom nodes for new features or effects
• Optimize existing workflows and performance
• Integrate new models and diffusion techniques