openpencil

The world's first open-source AI-native vector design tool and the first to feature concurrent Agent Teams. Design-as-Code. Turn prompts into UI directly on the live canvas. A modern alternative to Pencil. Maintained by ZSeven-W on GitHub, where it has earned 4,051 stars from the community.

It's actively developed around agent, agent-team, ai, and is a solid reference for anyone building with these tools.