List of free skill-test stuff for developerππ½
If you're looking for all programming tools around skill-test (not just free). Check this page List of skill-test Programming Tools

LeetCode
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
Tag: learning-resources, skill-test, preparation
Programming challenges from beginner to expert Interview questions
Hiring Without Whiteboards
A list of companies (or teams) that don't do whiteboard interviews. Whiteboards is used as a metaphor, and is a symbol for the kinds of CS trivia questions that are associated with bad interview practices. Whiteboards are not bad β CS trivia questions are
Tag: hiring, awesome-list, skill-test