Serial Controlled Motor Driver - two-channel DC motor controller with DRV8835 system

Pololu High-Power Motor Driver 36v15

Pololu High-Power Motor Driver 36v9

Pololu Jrk 21v3 USB Motor Controller with Feedback

Pololu Jrk 21v3 USB Motor Controller with Feedback (Fully Assembled)

Dual-channel electric motors controller (H-bridge) Arduino Motor Shield Rev3 with L298 for controlling two DC motors or one stepper motor with the possibility of using an electronic brake.

DRV8835 Dual Motor Driver Carrier

The board based on the L298 Dual Full-Bridge Motor Driver; can provide up to 4 Amps of current to the motors (2 Amps per motor). ROB-09571

ROB-09670

Motor-driven expansion board for Arduino, L293D, 74HC595 shift register, RoHS

Dual H-Bridge motor driver board, 2A, 36V max, L298N, RoHS

(DRI0009) 2A Motor Shield For Arduino

DRV8801 Single Brushed DC Motor Driver Carrier

A4990 Dual Motor Driver Carrier

This Kit with fully-dedicated PWM driver chip handles all the motor and speed controls over I2C. Only two data pins (SDA & SCL in addition to the power pins GND & 5V) are required to drive the multiple motors; you can also connect any other I2C devices or shields to the same pins. This  makes it drop-in compatible with any Arduino, such as the Uno, Due, Leonardo and Mega R3. Adafruit 1438

This shield makes it easy to control two high-power DC motors with your Arduino or Arduino-compatible board. Its dual robust VNH5019 motor drivers operate from 5.5 to 24 V and can deliver a continuous 12 A (30 A peak) per motor, or a continuous 24 A (60 A peak) to a single motor connected to both channels. Pololu 2507

This compact expansion board plugs directly into the GPIO header on a Raspberry Pi B+, A+, or Pi 2 and provides an easy and low-cost solution for driving a pair of small brushed DC motors. Pololu 2753