Attention Insight - Maximize advertising campaign results and design performance with pre-launch analytics.
Really Good UX - A library of screenshots for UX inspiration
Eyequant - We’ve built an artificial intelligence that instantly predicts how users will see your website so that you can create landing pages that sell
Usability.gov - Resource for user experience (UX) best practices & guides
Feng-GUI - Empowering designers with visual predictive analytics
UX Check - Easy heuristic evaluations on your website (chrome ext.)