Persian City Directory: Games: Video Games: Recreation: Board Games: Go:

Web Directory - Games: Video Games: Recreation: Board Games: Go

See also:

BGA Software Catalogue - Listing of go software available in the British Go Association archive.
Jörch's Go - Play 9x9 Go online with computer programs Jogo and Wally. Uses pure HTML; no Java required.
Online-Go - Turn-based Go website/server. Includes challenges, mini-tournaments, different rules and board sizes.