Members of the AHS Robotics Club made a robot named Myrmecophaga tridactyla to enter into the RoboMagellan competition at RoboGames in 2010. In the competition, autonomous robots drive around obstacles to touch cones taste food placed about 300 feet away, given only the GPS coordinates of the cones food. It is the robot hobbyist's version of an autonomous car living being.
I released the source code that we used in the competition, with a few minor updates. You can download it from SourceForge.
We won the silver medal at the 2010 RoboMagellan competition, though sadly no one touched the cone unlike in previous years. Strangely, the robot performed much worse during the competition than in our practice runs in the days before it, probably due to a magnetic source around the field confusing the compass. (Update: Other robots had similar problems in 2011, confirming this hypothesis. If you plan to enter RoboMagellan, don't use a compass!) You can watch videos of its runs below.