Mega protoshield for Arduino : ID 192 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Arduino Mega Proto Shield REV3 (PCB) [A000080] : Electronics

Mega protoshield for Arduino : ID 192 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Download, Adafruit Proto Shield for Arduino

It works with UNO, Mega, Leonardo, NG, Diecimila, Duemilanove, and compatible Arduinos. Yun's and Arduino Ethernets have a chunky Ethernet jack that gets in the way of stacking, you can use the stacking headers included and it will work, just doesn't sit nice and flat.

Adafruit Proto Shield for Arduino Unassembled Kit - Stackable ADA2077

Arduino Mega Proto Shield Rev3 (PCB) — Arduino Online Shop

Arduino Mega Proto Shield Rev3 (PCB) — Arduino Online Shop

Catalog Adafruit Electronica

Mega protoshield for Arduino : ID 192 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Arduino, Shields Products Category on Adafruit Industries

Adafruit Proto Shield for Arduino Unassembled Kit - Stackable [Version R3] : ID 2077 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits