Henner Zeller created the Spixels project to control 16 LED strips at once from a Raspberry Pi:

Spixels

The Spixels library and PCB to control SPI-type LED strips was originally developed for the Noisebridge Flaschen-Taschen project, but broken out as separate project because it is independently useful for many other LED strip applications.

hzeller shared the board on OSH Park:

Spixels – 16 SPI LED Strip Raspberry Pi Adapter