Colossus, Copyright 2001 David Ripton
Colossus is a Java clone of Avalon Hill's Titan(tm) boardgame. It allows hotseat play, play versus working but not very strong AI players, and network play. Beside the default Titan board and creatures it includes a number of Variants.
Recently (december 2009) they put a Public Game Server online where you can find opponents to play against (best chances to find somebody online is when it is afternoon/evening in the USA).
Their program is freeware, distributed under the GNU General Public License (local copy) This means that you have the right to make and distribute changes, as long as you always include the source code so that others can do the same. If you fix any bugs or add any features, please send us a copy so that we can fold them into the master code.
You'll find more information on the developer's website: