Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.
Platforma - Wireframe library of layouts and UI elements
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
Craftwork - A collection of User Interface resources made by Craftwork
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.