TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game. A wide variety of map scenarios have been developed for TripleA (World War II, Punic Wars, Napoleonic wars, etc.) with a variety of rules, units and many options (such as "low luck" which reduces the number of dice rolled making game depend more on strategy).
TripleA is programed in Java and can run on any platform that supports Java (including Microsoft Windows, GNU/Linux, and Mac OS X).
For live Multi-player games, the community maintains two lobbies for the most current Stable and Unstable versions. It is easy to find opponents online due to the popularity of the game: 10.000 downloads every month. TripleA also features a Play by Mail mode and an AI for single player mode.