The CNCPlot is an Arduino Leonardo compatible board with a couple of built-in stepper motor controllers, perfect for a DIY X/Y plotter or other robotics project.
CNCPlot now has a step-by-step Quickstart Guide, which includes connection details and example source code for using the onboard LCD, stepper outputs, servo output, and SD-card slot.
See the full guide at CNCPlot Quickstart Guide.