If you're tired of consuming most of your Arduino's pins to control a standard LCD display, the Serial LCD Backpack
offers a standard TTL serial interface for your HD44780 display. The backpack is meant to be soldered into the display and allows you to send text to the display via your UART (TX pin on the Arduino). I heart Serial!
Due to supplier issues we had a hard time getting stock for the popular L293N shield from FlamingoEda, but Sparkfun offers a great alternative the Ardumotor. Get your robot going and going fast with the Ardumotor shield which features the classic L293 H-Bridge for some very romantic motor driving.
Take Advantage of MHVLib and a Full Eclipse Toolchain- AVR Development To The Max. The MHVBoard
is a low cost Arduino clone, based off the Metaboard created by the new Hackerspace Make Hack Void
. It offers a TTL serial port, USB programming, ICSP, breadboard compatible headers and hardware already set up for software USB via V-USB. My other girlfriend is an AVR Programmer.