Shortlist

Name Skill Set(s) Required My interest
Brilliant RUST, Python Science Content Writer
Goodwill   edu.gcfglobal.org
LeetCode   Content Creator
Google - -
MyLabs (they built Synap)    
SMUD    
VotersEdge    

Reference

http://pulkitsinghal.blogspot.com/2015/05/awesome-tech-companies_30.html