Internet Backgammon
This is a two-player Backgammon game, that is, it has no human-against-computer mode. The two players can be sharing one computer's keyboard, mouse and monitor, or can be using two computers networked together over the Internet or any network with TCP/IP. ... The game includes a help file suitable for players new to Backgammon and experienced players alike. ... Sound effects are also included with the game. ... No separate server is required - the game is independent.
http://www.en-consult.ca/files/ibv102.zip - 5Mb - Download - Screenshot