CEBoard is a chess tool for Pocket PC.It's main purpose is game viewing and editing. It fully supports the PGN standard (including variations). The two main features of the 2.0 release are :

  1. multi-criteria, multi-file search
  2. hosting of chess engines : CEBoard is able to host CraftyClassic2004, Fruit 2.1 and Toga II 1.0

http://www.zanchetta.net/CEBoard