1)   TurnAbout 1.0
TurnAbout is a free Internet multiplayer Arcadia game creator which allows you to craft and share your own multiplayer games, using the Arcadia multiplayer game/chat/server environment. It comes with some games to start you off, then you add more!

 2)   Well of Souls A91
Well of Souls is Synthetic Reality's FREE multi-player Role Playing Game (MMORPG). It is extensible through a simple scripting language so that you can compose your own quests, create your own world, and share it with your friends.

 3)   SynSpace 1.0
SynSpace is a free multiplayer spacewars game for 8 players per channel. Players drop in on an ongoing battle as they feel like it. Powerups provide ships with additional weapons and effects. Space is filled with obstacles and zones.

 4)   SynJet 1.0
SynJet is a free Internet multiplayer battle flightsim for 8 players per channel. Cooperate or compete as you fly missions with your friends. Flexible mission format allows creation of new missions to share with your friends.

 5)   SynPool 1.0
SynPool is a free multiplayer pool table simulator with 4 tables per channel. Tables come with balls and a cue stick which is passed from player to player, to accomodate any type of pool game. No rules are enforced by SynPool itself.

 6)   SynSpades 1.0
SynSpades is a free multiplayer card game with 4 tables per channel. Play with partners or free for all. Award-winning bots (from my earlier game NetSpades) are available to fill any empty seats.