BeagleSat is an open-source nano satellite platform based on the BeagleBone embedded development board.

It's a framework and tool set for designing your very own CubeSat from the ground up, while expanding the CubeSat community and bringing space that much closer to anyone willing to hack.

If you're looking for more info you've come to the right place. All the stuff I've ever written on BeagleSat is linked below, along with a couple of other usefull links. Be sure to check them out and check them often for updates.