Prototyping
5 projects tagged Prototyping, in the order of our ranking. Some replace a paid product; others are free tools people use alongside one.
Most often they replace Figma, Sketch or Lovable. 5 of 5 run on your own machine. The most starred is OpenDesign, with 106k stars on GitHub.
| Compare | Project | Runs on my machine | Allowed at work | Paid services | Hardware | Setup | Stars |
|---|---|---|---|---|---|---|---|
| OpenDesignLocal-first desktop workspace where a coding agent or your own model key turns a brief into web prototypes, slides, images and motion graphics. | Yes | YesApache-2.0 | Optional only | See its page | Easy | 106k+1,383 this week | |
| PenpotOpen-source, self-hostable design and prototyping platform with real-time collaboration, components, design tokens and CSS/SVG inspect. | Yes | ConditionsMPL-2.0 | Optional only | No graphics card needed | Medium | 62k+277 this week | |
| Pencil ProjectFree desktop GUI prototyping and wireframing tool with stencil collections for web, mobile and desktop mock-ups and diagram drawing. | Yes | ConditionsGPL-2.0 | None required | See its page | Easy | 9.9k+6 this week | |
| Quant-UXPrototyping and usability-testing tool to build clickable UI prototypes, run tests with users and get analytics on how they used them. | Yes | ConditionsGPL-3.0 | None required | No graphics card needed | Medium | 2.8k+8 this week | |
| desigmaEarly-alpha native Rust design tool with frames, auto layout, components, prototyping, Dev mode code, whiteboards and Figma .fig import. | Yes | YesMIT or Apache-2.0 | None required | No graphics card needed | Easy | 954+265 this week |
Tick up to three to compare. “Allowed at work” includes projects with conditions, marked amber. Unknown is never counted as a yes. Stars show attention, not quality.
Know a project we’re missing? Suggest it.