Quant-UX is an amazing Open Source design tool that now works with Figma too! It’s free for anyone to use and build upon – check out the code on GitHub, and give them a star ⭐️. Quant-UX’s visual analysis makes it easy to find and quickly fix pain points in your UI designs. It’s great for research, testing and analysing interactive prototypes.
If you want to contribute to the project, check out their Open Source page, where you can learn how to build new components and much more.