SparkFun Big Easy Driver Kit - Electronics-Lab.com
Amazon.com: SparkFun Big Easy Driver Stepper Motor Driver Board for bi-Polar Stepper Motors up to a max 2A/Phase Maximum Motor Drive Voltage of Around 30V Includes on-Board 5V/3.3V Regulation Allegro A4988 Chip :
SparkFun Serial Controlled Motor Driver - ROB-09571 - SparkFun Electronics
ROB-16836 SparkFun Electronics | Development Boards, Kits, Programmers | DigiKey