Design Tools GitHub Repositories (2026) · Open Source Tools

An agent-first linter for Tailwind design systems. Write design system rules that agents can verify.

Codex plugin for OpenPencil — an interactive Rust/WASM canvas for AI-assisted UI design. Create editable .op files from prompts, refine selected elements, generate image assets, and install with one prompt on macOS, Windows, and Linux.

An open source prototype sandbox for designers and product managers who build.

GPL Electronic Design Automation

Visual builder for React. Build apps, websites, and content. Integrate with your codebase.

A build system for creating cross-platform styles.

Penpot exporter Figma plugin

All your graphic assets, organized and within reach. A native, local and free GNOME app.

User interface engine driven by a declarative language + Rust