Chaotic Domain aims to revolutionize the RTS industry. Made up a team of "elite gamers" (not to mention great programmers and 3D modelers) we're combining the greatest features we like in other strategy games, fixes for some of the "annoying" parts of those games, and many new ideas of our own. With a full 3D galaxy that allows you to micro- or macro-manage and very customizable games, it should appeal to every user.
Freeciv is a multiuser reimplementation for Unix/X of the famous Microprose game of Civilization. By default, the game is an improved Civ II, but this can be customized; modpacks for near-100% compatibility with Civ I and Civ II are included. Multiuser gameplay is real-time: in each turn, all human players move concurrently. The game is designed to remain fairly playable even on poor network connections. Freeciv can also be played on standalone machines, and its AI players are a good challenge for beginners. The source code comes with the server, two X clients, and non-X clients for MS Windows and Amiga. Freeciv is released under the GNU General Public License. It is maintained by an international team of coders and enthusiasts, and is easily one of the most fun and addictive network games out there.