Digistump
The revolutionary DigiX and Digispark boards and related accessories..
The DigiX is the ultimate 100% Arduino Due compatible dev board with built-in Wifi and an on-board socket for short range mesh networking modules, Audio, USB OTG, MicroSD, EEPROM, and 99 i/o pins!
Arduino too big, too costly, too cumbersome? Digispark came in at the right time as the right solution and has sold more than any of the miniaturised Arduinos and Arduino clones till date.
Perfect for students, hobbyists on a budget, space cramped portable projects, battery powered robotics, air borne electronics and more...
Small packaging, without any compromise on processing power.
Here is a video of what the Digispark is capable of..
For Support and Project ideas you can also check this forum