If you're involved with embedded electronics then you'll know about the Raspberry Pi, a single board computer with the surface area of a creditcard, that runs Linux. Such devices are often used as autonomous little brains inside clever devices that monitor, control, play sound and video files, and are even used as cheap computers for schools. Clever devices need clever data storage, so PostgreSQL is an obvious choice.
The good folks that develop PostgreSQL have a buildfarm that tests the functionality of PostgreSQL on many different hardware platforms and operating systems, and Rasberry-Pi is one of them. The two little critters that do the work are called Hamster and Chipmunk.
One more reason why I prefer PostgreSQL.