Motor drivers and other robotics shields for Arduino
The gShield for Arduino is a complete hardware solution for Dank’s CNC motion control system called grbl.
Adafruit Motor/Stepper/Servo Shield for Arduino v2.3 Kit can be used with DC and stepper motors
Adafruit 16-Channel 12-bit PWM/Servo Shield that uses only the I2C interface.
Relay shield has four inbuilt relays to control the voltage.
Arduino ProtoShield Kit is an handy tool that also provides a soldering areas for users.