Really Good UX - A library of screenshots for UX inspiration
Rage Grade by FullStory - Benchmark your customer frustration
Usability.gov - Resource for user experience (UX) best practices & guides
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
UX Check - Easy heuristic evaluations on your website (chrome ext.)
UserBit - A full-stack qualitative research platform for UX & product teams.