UX Challenges - Done reading about UX? Start doing it.
FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.
Uxcel - The easiest way to learn UX/UI design
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.
uxtoast: Learn UX Design - Become familiar with design laws and learn how to use them.
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.