Amazon.com: SunFounder Ethernet Shield W5100 Compatible with Arduino UNO R3 Mega 2560 1280 A057 : Electronics
Amazon.com: L293D Drive Module Motor Drive Shield Expansion Board Motor Control Board Compatible with Arduino UNO Arduino Mega 2560 Duemilanove Diecimila 2PCS : Electronics
Amazon.com: MEGA 2560 R3 Proto Prototype Shield V3.0 Expansion Development Board + Mini PCB Breadboard 170 Tie Points for arduino DIY Kit : Electronics
Amazon.com: Gump's grocery TFT 3.2'' 4.3'' 5.0'' 7.0'' Mega Touch LCD Shield Expansion Board for Arduino : Electronics