Laws of UX - Key maxims that designers must consider when building UX
Really Good UX - A library of screenshots for UX inspiration
prodmgmt.world - Quickly find product & UX techniques to get unstuck
Usability.gov - Resource for user experience (UX) best practices & guides
Checklist Design - The best UI and UX practices for production ready design.
UX Check - Easy heuristic evaluations on your website (chrome ext.)