Intrade (Popularity: )
http://www.intrade.com/ Provides its members with the opportunity to trade futures based contracts on various sports worldwide.
Matched Bets (Popularity: )
http://www.matchedbets.com/ Person to person betting exchange that enables players to bet directly with each other on all major events.
PlayersTime (Popularity: )
http://www.playerstime.com Sportsbook and casino that requires no downloading to play. One account can be used for both phone and internet customers
Western OTB (Popularity: )
http://www.westernotb.com/ Offers telephone wagering on major thoroughbred and harness tracks in the U.S. Available in the U.S. only.