Gammon On Net 

Enjoy 24 hour backgammon tournaments with players around the world in a real-life 3D setting. Watch other backgammon games; get useful strategy tips and free-play as much as you want.
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Play65 

Play Online Backgammon for free or For Money with friends. Play65 Backgammon is completely free and is user friendly. 1000+ online players. The software is downloadable and has a chat feature included when playing against other players.
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