Is there a complete list of companies google bought? This week they got Slide (http://tcrn.ch/d3Z7UC) and Instantiatoins (http://www.instantiations.com/). Not a long time ago, they got Metaweb (http://www.metaweb.com/). Wikipedia has a list, but some are missing (http://en.wikipedia.org/wiki/List_of_acquisitions_by_Google).