This is hardware but...
Here is our AVR project we are working since late 2011.
It is something like UZEBOX. But with another philosophy.
It is based on Jerry´s AVGA platform.
(He is also behind all RetroWiź hardware, HW designer).
I am WWW and FORUM admin, enclosure designer.
We call our platform RetroWiz. (from "Retrocomputer Wizard" or "Retrogaming Wizard").
Our webpage will be here:
http://www.retrowiz.com
Our forum is online (since 12.nov.2012):
http://www.forum.retrowiz.com
1st early prototype - brown AVGA y. 2009:
Video AVGA platform:
http://www.youtube.com/watch?v=-mMdc-rNNtU
Screenshot from AVGA platform:
Hackaday Blog:
http://hackaday.com/tag/avga/
RETROWIZ:
2nd prototype // green one y.2011-2012:
3th prototype PCBs // blue one y.2012:
Our JAVA game editor:
SPECs:
{still work in progress, not final}
PCB half size of Raspberry Pi...
172x200 x 16 colors
simple FM synth codec (not yet)
menu and firmware on chip
20 mhz/8bit risc cpu (ATMEGA328)
audio out
VGA out
PS/2 keyboard port for keyboard or arcade joy hacks
C language API
SD card port
good price
It will be awesome platform for FM music, pixelart, retrogames, indiegames, coding...
Join FORUM, join DEVELOPMENT and welcome to RetroWiz world...
Have a nice day.
Matej