Reddit raised $200 million in funding and is now valued at $1.8 billion [1]

Q&A app Quora valued around $1.8 billion in $85 million fundraise [2]

Docker Is Raising Funding at $1.3B Valuation [3]

Twitch was acquired by $970M, so I guess not quite $1B.

[1] https://www.recode.net/2017/7/31/16037126/reddit-funding-200...

[2] https://techcrunch.com/2017/04/21/uniquorn/

[3] http://www.datacenterknowledge.com/archives/2017/08/10/docke...