Maybe you've heard of Aviary—it's the company behind the Aviary photo editor for Android and iOS. That's not all the company does, though. It also makes its tools available through a free SDK, and that's what led Adobe to scoop up the company for an undisclosed sum.
Zillow's home and apartment finding tools are quite popular on Android, but you probably never would have guessed the company was so flush with cash that it could snap up Trulia for $3.5 billion. Don't go too crazy, though. This deal is actually being done completely in stock.