RoboRallytm is an excellent board game from Wizards of the Coast. I've written a PalmOS version of the game, which is available for download below.
If you don't know the game, you're probably best off reading the rules (PDF) before trying to play.
If you do know the game, I should probably point out that:
RoboRallytm is a registered trademark of Wizards of the Coast. This PalmOS version of the game is produced without official permission, and so may disappear from this website at any time (i.e. if Wizards of the Coast contact me with any kind of complaint).
DISCLAIMER: you run this software at your own risk. I take no responsibility if it trashes your PalmPilot; however, I would be interested to hear about any bugs. You never know, I might even fix them.
Update [Jan05]: New version with colour support now in place
Download RoboRally.prc v0.95 (98k) for PalmOS >= 3.0
I've probably done about as much development of this project as I care to at the moment, but I do have a list of features I could return to in future.