Anima App - Design, get feedback, convert to code, publish, iterate.
Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Sketch Repo - Collection of resources for anyone who uses Sketch
Platforma - Wireframe library of layouts and UI elements
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Craftwork - A collection of User Interface resources made by Craftwork