Source Wireframe Kit - Library of 537 blocks for desktop and mobile prototyping
Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Craftwork - A collection of User Interface resources made by Craftwork
Platforma - Wireframe library of layouts and UI elements
Streamline - Streamline is a web-based vacation rental software that manages vacation rental properties with flipkey integration, online booking, lead management, credit card processing, etc.
Method Wireframe Kit - Find your method of being incredibly fast in prototyping.