Arduino Nano IO Expansion Shield For Arduino UNO Nano 3.0 Compatible Nano IO shield is a breakout board for Arduino Nano.
Adafruit Proto Shield for Arduino Kit - Stackable Version R3 This prototyping shield is the best out there (well, we think so, at least), and now is even better with Version R3
Funduino Prototyping Shield with mini Breadboard for Arduino Mega Prototype shield with mini breadboard for MEGA 2560 microcontroller.
Funduino Prototyping Shield w/ mini breadboard for Arduino Uno Prototype shield for UNO R3 microcontroller.
ProtoScrew Shield The ScrewShield extends all pins of the Arduino out to 3.5mm pitch screw terminals.
Mega Sensor Shield V2.4 (Compatible with Arduino Mega) Say goodbye to messy cables and clueless pluging/unpluging!
Screw Shield V2 For Arduino The DFRobot Arduino-Compatible Screw Shield is a terminal expansion board that allows you to screw in jumper wires to a screw terminal for a much stronger and secure connection for your I/O and power pins.
IO Expansion Shield for Arduino V7 The new IO Expansion Shield V7 has arrived,from the best selling family of IO expansion shield for Arduino.