Netrek is a 16-player two-dimensional graphical real-time battle simulation with a Star Trek theme. A game is divided into two teams of 8 players (or fewer), who dogfight each other and attempt to conquer each other's planets. Netrek is the probably the first video game which can accurately be described as a "sport". It has more in common with basketball than with arcade games or Quake. Its vast and expanding array of tactics and strategies allows for many different play styles; the best players are the ones who think fastest, not necessarily the ones who twitch most effectively.
Plasma EBG is an empire building game with an isometric view. It runs in multiple resolutions with graphics being displayed better for higher resolutions; hence, lower resolutions do not suffer from being too large, etc. In the future several viewing engines will be available, such as EBG-opengl and EBG-2d. There is a separate module called EBG-dev which features the latest AI-development, as well as a separate server module.
Quantum Star SE is a browser-based space strategy and trading game played across a mapped galaxy against other players. Utilizing mining, trading, research, and production through easy-to-use tools, QS enables both broad micro-management of resources or more "aggregated" methods. Players compete, combat enemy fleets, and manage planets to become the "last man standing". No user downloads are required, and the game is free to host or play.