The backgammon newsgroup
  rec.games.backgammon

Mark Your Calendar Alive! tournament calendar (Carol Joy Cole)
  www.chicagopoint.com/calendar.html

WWW backgammon page (Stephen Turner)
  www.statslab.cam.ac.uk/~sret1/backgammon

The backgammon FAQ (Mark Damish)
  www.cybercom.net/~damish/backgammon/bg-faq.html

The backgammon portal (Art Grater)
  www.back-gammon.com

Backgammon Galore (Tom Keith)
  www.bkgm.com

BackGammon By the Bay (Richard McIntosh & Beth Skillman)
  www.backgammon.org/bgbb

McCool's Backgammon Page (Kate McCullough)
  www.northcoast.com/~mccool/bg.html

Gammon.com (Patti Beadles)
  www.gammon.com

Chicago Point Online Backgammon (Bill Davis)
  www.chicagopoint.com

Flint Area BackgammoNews (Carol Joy Cole)
  homepage.interaccess.com/~chipoint/cjc.html

Wordwide Backgammon Federation (Alberto DaPra)
  www.wbf.net

British Isles Backgammon Association (Michael Crane)
  www.cottagewebs.co.uk/biba

Nevada Backgammon Association (Howard Markowitz)
  www.nvbg.com

New England Backgammon Club
  www.nebg.org

Backgammon glossary (Tom Keith)
  www.bkgm.com/glossary.html

Machine learning in games
  forum.swarthmore.edu/~jay/learn-game/systems/gammon.html

"Backgammon Match Play Doubling Strategy" (Tom Keith)
  www.bkgm.com/articles/mpd.html

"How to Compute A Match Equity Table" (Tom Keith)
  www.bkgm.com/articles/met.html

Some Backgammon Things
  www.pmms.cam.ac.uk/~gjm11/bgm