Best Open Source prototyping Libraries

A curated list of the most popular GitHub repositories tagged with prototyping. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1penpot/penpot

Penpot: The open-source design tool for design and code collaboration

44,328Clojure

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#2evolus/pencil

The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.

9,568JavaScript

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#3IBAnimatable/IBAnimatable

Design and prototype customized UI, interaction, navigation, transition and animation for App Store ready Apps in Interface Builder with IBAnimatable.

8,655Swift

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