You can play against the computer with 5 skill levels, or you can play against each other also via Infrared.

The nice animated graphics and sound is confugurable.

Features:
- Intelligence.
- Undo a Move.
- Hint Function.
- 5 Skill Levels.
- Play with Computer or other player.
- Play over infrared with other player.
- Small.

Free registration:
- Username: free
- Registration key: 1D5002D7

SOURCE

http://www.ask4soft.com/blog/CategoryView,category,PPcRev...

Reviews:

***** [Feb 11, 2005] by Mike Longo using ipaq
PPcReversi is a great version of the game Othello/Reversi. My kids and I love the board game, and I've been looking for a version for my Pocket PC. This one has bright and crisp graphics along with animation! The sounds make it even more complete. Thanks for the fun.