Ember:

  * Yahoo
  * Square
  * Vine
  * NBC News (front page)
  * Netflix (real time tools)[1]
  * Zendesk
  * Groupon
  * Twitch
  * CodeSchool
  * Urbanspoon
  * Discourse
  * TravisCI
  * Ghost

Angular:

  * DoubleClick
  * MSNBC (front page)
  * BBC [2]
  * The Guardian [3]
  * Huffington Post [4]
  * Udacity [5]
  * Desk.com [6]
  * Plunker

Please reply if you know more, would love to build out a real census of who's using what

[1] - https://twitter.com/ebryn/status/433402427979493377

[2] - http://www.bbc.co.uk/blogs/internet/posts/Building-BBC-Live

[3] - https://github.com/guardian/guardian.github.com/blob/master/...

[4] - http://www.huffingtonpost.com/john-pavley/huffpost-content-m...

[5] - http://www.quora.com/Udacity/What-is-Udacitys-technology-sta...

[6] - http://www.desk.com/careers/angular-engineer