Pololu - Arduino Uno R3

The SparkFun Arduino Uno starter kit makes it easy to get started building entertaining and educational circuits with an Arduino. The kit includes an

Arduino Uno Starter Kit

Pololu - Arduino Uno DIP Edition

Pololu DRV8835 Dual Motor Driver Shield for Arduino - PDF Free Download

How to play sound when turning off Arduino via pushbutton & Pololu switch? - General Electronics - Arduino Forum

Motoron M3S550 Triple Motor Controller Shield for Arduino (No Connectors) - RobotShop

Pololu DRV8835 Dual Motor Driver Shield for Arduino

Using a Pololu Programmer v2 as USB to Serial for communicating with an Arduino Uno R3 - Other Pololu products - Pololu Forum

Pololu - Arduino Uno DIP edition with U.S. quarter for size reference.

Pololu Dual VNH5019 Motor Driver Shield for Arduino