Wikipedia
NimbleBit
NimbleBit is an American developer and publisher of iOS and Android mobile apps. Some of their popular titles include Pocket Frogs, Tiny Tower, and Pocket Planes. It was co-founded by brothers David and Ian Marsh.
Founder Ian Marsh has accused Zynga of copying its award-winning Tiny Tower game to create Dream Heights. Zynga had attempted to buy NimbleBit, but on refusal, Zynga created Dream Heights. NimbleBit then added a mission in Tiny Tower called "Beware of dog", a reference to Zynga's logo, with the caption stating "After failing to buy your tower, a rival developer would like:"; several materials are listed, with which they want to build their own tower.