Forest - Contains five levels, game study mode, and other features. [Windows] - http://perso.orange.fr/ocasile/forest.htm
Pointy Stone Othello - A strong Othello program that includes internet play between humans and multiple playing brains. - http://www.3dkingdoms.com/pointy3/pointy3main.htm
Edax - Contains everything there is about Edax, one of the strongest Othello programs - http://abulmo.club.fr/edax/index.htm
NBrowser - A graphical program to read Chris Welty's ntest's opening book - http://othellogateway.com/othello/nbrowser.php
WZebra - Extremely strong reversi program, with many different levels and an extensive opening book. [Windows 95] - http://www.radagast.se/othello/download.html
Darwersi - Uses an AI that utilizes Darwinian evolution. [Windows] - http://www-sop.inria.fr/cafe/Olivier.Arsac/darwersi/
Edge Reversi - Uses an alpha-beta search with selective extension programmed in Delphi. [Windows] - http://www.stevemaughan.com/reversi.htm
Logistello - Open source program written by Michael Buro, as well as his research papers about related computer science algorithms. [Linux] - http://www.cs.ualberta.ca/~mburo/log.html