1. gosquared
https://github.com/gosquared
2. slack
https://github.com/slackhq
3. The New York Times
https://github.com/NYTimes
4. Google
https://github.com/google
5. MS Office dev
https://github.com/OfficeDev
6. TheLevelUp
https://github.com/TheLevelUp
https://www.thelevelup.com/
7. adobe
https://github.com/adobe
8. github
https://github.com/github
9. Alterplay
https://github.com/Alterplay
10. nxtbgthng
https://github.com/nxtbgthng
11. netflix
https://www.github.com/netflix
http://netflix.github.io/
http://techblog.netflix.com/2015/10/evolution-of-open-source-at-netflix.html
http://www.oschina.net/news/67555/evolution-of-open-source-at-netflix
12. intenthq
https://github.com/intenthq
13. facebook
https://opensource.facebook.com
https://github.com/facebook
https://github.com/facebookincubator