Amazon.com: HiLetgo USB Host Shield for Arduino UNO Support Google Android ADK USB HUB : Electronics
Amazon.com: SunFounder Ethernet Shield W5100 Compatible with Arduino UNO R3 Mega 2560 1280 A057 : Electronics
Amazon.com: SunFounder Ethernet Shield W5100 Compatible with Arduino UNO R3 Mega 2560 1280 A057 : Electronics
Electronics-Salon 10x Prototype PCB for Arduino UNO R3 Shield Board DIY. by CZH-LABS: Amazon.com: Industrial & Scientific
Amazon.com: CAN-BUS Shield Compatible with Arduino and Seeeduino : Electronics
Amazon.com: ElectroCookie Uno Terminal Block Shield Kit, Compatible for Arduino Uno R3, Push-in Simple Spring Connector Expansion PCB Module : Electronics
Gikfun Screw Shield Expansion Board for Arduino UNO R3 EK7007
Arduino UNO REV3 [A000066]
HiLetgo Multi-Function Shield ProtoShield Multi-functional Expansion Board Sensor Shield Module with Four Digital Display for Arduino: Amazon.com: Industrial & Scientific
Gikfun Prototype Shield DIY KIT for Arduino UNO R3 Mega 328P (Pack of 3 Sets) Ek1038x3