Youtube
Acquired by Google in 2006.
Android
Acquired by Google in 2005.
Paypal
Acquired by eBay in 2002.
Motorola
Motorola Mobility acquired by Google in 2011.
NeXT
Acquired by Apple in 1996.
Sun Microsystems
Acquired by Oracle in 2009.
Skype
Acquired by Microsoft in 2011. (Previously acquired by eBay.)
Zappos.com
Acquired by Amazon in 2009.
AdMob
Acquired by Google in 2009.
Flickr
Acquired by Yahoo in 2005.
Acquired by Facebook in 2012.
Applied Semantics
Acquired by Google in 2003.
VeriSign
Acquired by Symantec in 2010.
The Huffington Post
Acquired by AOL in 2011.
Palm
Acquired by HP in 2010
Urchin Software
Acquired by Google in 2005.
ITA Software
Acquired by Google in 2010.
Crescendo Networks
Acquired by CISCO in 1993.
Tweet Deck
Acquired by twitter in 2011
Diapers.com
Acquired by Amazon in 2010.
Source:Ranker