Google tried to buy this video compression company for $106 million, but its shareholders held out for a higher price and eventually got $133 million in January 2010. Last summer, Google announced it would open-source the VP8 video codec it acquired with On2, and rename it WebM. Google has since tried to push WebM as a replacement for H.264, a much more widely used standard for Web video.
#7: Slide social gaming, $228 million (estimated)
Google bought the social gaming company behind SuperPoke last August for $228 million (the price was originally reported at $182 million). Slide still operates as a separate entity within Google, and doesn't seem to be contributing much to Google+, the company's new social networking initiative. Instead, it's out there creating standalone mobile products like photo-sharing app Photovine.
