LiveOthello
Web applet for following live Othello tournament games

Reversi – An animated guide
Steve MacGuire’s guide to Othello openings and tactics

eOthello
Play Othello games at your own pace (up to 3 days per move)

PlayOK
Polish based game site with a “Reversi room” that attracts Othello players from all over the world

V.O.G.
You will need to download a bit of software for this, but it’s well worth it

Othello Quest
Formerly known as “Reversi Wars”, only available on mobile phones.

WTHOR DB
An international database of Othello games that can be browsed using Zebra

Belgium
Belgian Othello Association

Denmark
Dansk Othello Forbund

England
British Othello Federation

France
Fédération Française d’Othello

Germany
Othello Club Deutschland

Italy
Federazione Nazionale Gioco Othello

Japan
Japan Othello Association

Korea
Korean Othello Association

The Netherlands
Nederlandse Othello Vereniging

Sweden
Svenska Othello Förbundet

Thailand
Thailand Othello Association

USA
United States Othello Association

W.O.F.
World Othello Federation