Chesley is a chess engine targeting Unix-like platforms and the xboard GUI. It implements a number of modern chess programming techniques, including bitboard move generation, transposition tables, etc.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
As of this release, Chesley is a stable and reasonably strong hobbyist Chess engine. This release features many fixes for serious bugs, significant strength improvements, Windows support, and initial work on corpus statistics for PGN databases.