Ajax
- Java othello applet with a friendly interface and a very strong engine. Offers five levels of difficulty.
- http://abulmo.club.fr/ajax-en.htm

Neave Games - Hexxagon
- A variation of Othello when the board is at an angle. Requires a Flash compatible browser. May be played online or downloaded.
- http://www.neave.com/games/hexxagon/

WebGames - Reversi
- Javascript based game. Doesn't provide support for a computer player.
- http://www.irt.org/games/js/reversi/

Reversi
- Java based game that can be played only againest the computer. Offers four difficulty levels.
- http://hem.passagen.se/mnomn/reversi.html

Artifact Arcade: Reversi
- Flash based game that provides also detailed instructions.
- http://www.artifactinteractive.com.au/arcade/reversi.html

Othello
- Java applet with sound support and customizable difficulty level of the computer player.
- http://www.spee.nl/othello/applet.htm