Mobile Chat Kit - UI kits & sample apps for building in-app mobile chat
Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Ambient Design - Ambient is a mobile app design market where you can get unique mobile UI kits.
Platforma - Wireframe library of layouts and UI elements
iOS Design Kit - The newest library of native iOS templates
Craftwork - A collection of User Interface resources made by Craftwork