Really Good UX - A library of screenshots for UX inspiration
FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.
Usability.gov - Resource for user experience (UX) best practices & guides
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.
UX Check - Easy heuristic evaluations on your website (chrome ext.)
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.