Physical requirement, Palm Pilot original, Palm III style devices. This device attaches to the Palm device using the accessory "pits" at the bottom of the housing. From the Readme.txt:

The Palm Navigator combines a magnetic sensor module with ...

An excellent, Tetris-style arcade game for Palm OS. The rules are simple: place the balls of the same color next to each other. They blow up when three or more come together, and remaining bubbles move up to fill the gap. More explosions - more ...

Mulg is a very simple maze game. The object is to guide a marble through various mazes. Along the way, you encounter stones blocking your passage, slippery ice, flipper bumpers, and more.

As you complete each level you are allowed to proceed to ...

Demo CD with a bundle of freeware and shareware.

Found on https://web.archive.org/web/20060501212927/https://www.sopht.ca/index.php?s=39 while browsing https://www.club.cc.cmu.edu/~mdille3/fossil_wristpda/

Simple watch face for the WristPDA, source code included.

Looking for a Simon Says game for your Palm? Search no more! PalmSimon by Patrick McDonald is a Simon Says game released in 2004 for Palm OS. A Palm with a color display is recommended.

Devil House - Resurrection is an addictive platform arcade game with plenty of gruesome action and sophisticated game play! You will barely have time to reload your gun barrel as you splatter all the undead monsters, demons, and slimy, spidery ...

Classic Star Trek game for palm OS. Choose your mission and go battle Klingons, don't forget to refuel when you get to a starbase!

This is shareware but you can play through to Lt Commander without registering

Cardio Sport XS is the only ECG-type cardio software equipped with a real-time core, providing high precision. It can, with the help of a sensor adaptable to Palm One, Sony Clie, Hamspring®, and Treo®, use signals from heart rate belts such as ...

Frustrated by a tiny keyboard? Hate Graffiti-2? Text entry too painful? TealScript is the Handwriting Solution.

TealScript adds Graffiti text input to Treo and Centro smart phones, freeing you from tiny keyboards. For devices that already ...