Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Wirify - 29 Sep 2017 . Wirify is available in two versions: Wirify is free and available on the homepage; Wirify Pro is available to customers with active Wirify credits. Wirify and Wirify Pro menu items - Wirify user guide.
Platforma - Wireframe library of layouts and UI elements
Craftwork - A collection of User Interface resources made by Craftwork
Wireframe.cc - Sweet and simple online wireframing tool.
Method Wireframe Kit - Find your method of being incredibly fast in prototyping.