Wonderlic - Wonderlic offers pre-employment tests and student selection assessments.

Stackshare - StackShare is a comprehensive website that gives its users the chance to organize and share their technology stack with the rest of the community.

iMocha - Make intelligent talent decisions.

Setalist - The easiest way to make awesome lists for the internet

HackerEarth Recruit - HackerEarth provides technical recruitment solutions for talent sourcing and skill assessment.

Techmap.io - Techmap is a workplace search engine to find companies using technologies (e.g., Rails, PHP, Java, etc.) that are used internally. Finally, a "Google for Workplaces" that helps people find a place to work with technologies they love!