Engage is an online multiplayer gaming provider. Entertainment Online has some old standbys and some original games. Action, sports, kids, puzzle, casino, etc. Gamesville is an online service featuring games like Bingo Zone, Picturama, AceyDeuecy, and more. Ice Online is an online service sporting games like Spades, Hearts, Trivia, and their original Blackheart.
Many more games are available as well.
MSN Gaming Zone is Microsoft's multiplayer gaming site. Find opponents for Monster Truck Madness or Hellbender, or just play hearts, bridge or spades. Kahn is a utility used to play to play network games over the internet. One small fee for a lifetime of multiplayer gaming. Kali is another way to use the internet to play network games with other people.