Wikipedia
SheevaPlug
The SheevaPlug is a " plug computer" designed to allow standard computing features in as small a space as possible.
One of the first such computers on the market, the device has a 1.2 GHz Marvell Kirkwood 6281 ARM-compatible CPU, a.k.a. Feroceon. The operating system is Ubuntu Linux version 9.04 A software development kit for the platform is also available