Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Chat by Stream - Build and ship in app messaging in a few hours
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
Ambient Design - Ambient is a mobile app design market where you can get unique mobile UI kits.