Going by List of acquisitions by Google [1], and from my knowledge of the founde...

Going by List of acquisitions by Google [1], and from my knowledge of the founders (which is not complete by any means):

Reqwireless - UW founders

BumpTop - UT founders

Zetawire - Uvic / UT founder

SocialDeck - UW founders

Pushlife - UW founder

PostRank - UW founders

Mhmm, though I'm certain this is not a complete list, and SocialGrapple was listed under USA until I corrected it. :P