Hi Don, There is the Zeta Z80 SBC on the "plain" N8VEM group. It has an add-on board with Propeller keyboard, VGA, and SD card that makes a nice 2 board stack and runs off a 5V wall wart (no special PSU needed). http://n8vem-sbc.pbworks.com/w/page/44366173/Zeta%20SBC If you want something really small: http://hackaday.com/2014/08/19/the-most-basic-basic-computer/ Andrew