Adafruit Gemma M0 connected to LPD8806-48 LED strip with SPI port
The Adafruit Gemma M0 is a quarter-sized microcontroller board with a 48 MHz 32-bit Cortex M0+ processor, 256 KB flash, 32 KB RAM. Most importantly it's $10!
The Adafruit LPD8806x48 is a flexible weatherproof strip of digitally-addressed (individually-controlled) LEDs with 7-bit precision on red, green, and blue.
There's no library for connecting them together, so I wrote some code to use the Gemma M0 integrated SPI hardware bus.