Amazon.com: HiLetgo USB Host Shield for Arduino UNO Support Google Android ADK USB HUB : Electronics
Amazon.com: Arduino MKR MEM Shield [ASX00008] : Electronics
Amazon.com: Arduino Motor Shield REV3 [A000079] : Electronics
Amazon.com: HiLetgo TB6612 Mosfet for Arduino Motor Shield Standard IIC I2C TB6612FNG Stepper Motor PCA9685 PWM Servo Driver Shield V2 Robot PWM Uno Mega R3 Replace L293D : Industrial & Scientific
HiLetgo L293D DC Motor Drive Shield Stepper Motor Drive Shield Expansion Board for Arduino Duemilanove Raspberry Pi: Amazon.com: Industrial & Scientific
Amazon.com: ElectroCookie Uno Terminal Block Shield Kit, Compatible for Arduino Uno R3, Push-in Simple Spring Connector Expansion PCB Module : Electronics
Amazon.com: Seeed Studio CAN-Bus Shield V2 Compatible with Arduino for Controller and Transceiver, Arduino Shield Adopts MCP2515 and MCP2551. : Electronics