SparkFun Pro Micro - 5V/16MHz - Solarbotics Ltd.

Pro Micro 5V/16MHz Arduino Compatible Microcontroller - RobotShop

SparkFun Arduino Pro Mini Starter Kit - 5V/16MHz - KIT-15254

Pro Micro - 3.3V/8MHz - DEV-12587 - SparkFun Electronics

Arduino Pro Mini 328 - 5V/16MHz - DEV-11113 - SparkFun Electronics

DEV-12640 - SparkFun, Pro Micro 5V 16MHz

Raspberry Pi Breakout Board - Solarbotics Ltd.

Pololu - Discontinued Items

SparkFun Pro Micro - 5V/16MHz : Electronics

SparkFun Pro Micro (5V/16MHZ) in Canada Robotix