Castle Vox is a simultaneous-turns strategy game. Out-strategize your opponents on a variety of war maps. Board game fans will particularly enjoy Castle Vox, which mixes elements from both Diplomacy and Axis & Allies. Castle Vox includes maps spanning many eras and mythologies, such as the American Revolution, Hades, Japan, Napoleonic Wars, Native America, Outer Space, and the Roman Empire. The map editor lets players create their own boards. Multi-player modes allow both relaxed one-move-a-day games as well as fast speed wars.
There is a (somewhat-limited) free version of the game available for download.http://sillysoft.net/vox/