This is the Arduino shield version of our TLC5940 Breakout. The PWM Shield will allow you to generate up to 16 PWM signals from your Arduino by utilizing the power of the TLC5940 IC.
SparkFun has mounted a RFM22 433MHz ISM FSK transceiver module to a shield. What's it do? Let you do a cheap point-to-point (and basic mesh networks) using 433MHz!
You want to move power? We've got the SeeedStudio Relay Shield that'll let the milliamperes of an Arduino-compatible board to control up to 35VDC 70W on 4 separate channels!