0 A.D. (pronounced "zero ey-dee") is a cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of ancient civilizations, each depicted at their peak of economic growth and military prowess.
WarTactical is a wargame in which each screen pixel corresponds to 10 feet of ground area, instead of splitting the field into hexagons. You can play a game against the computer or play a simple random setup. Dice are rolled when you attack, and this result is added to modifiers that are derived from the situation, such as whether the unit is pinned or how much armor it has, as well as what terrain it's on. You need to stay in contact with your HQ (leader) to move far. WW2 (or Modern) units like artillery, infantry, LMGs, paratroopers, cars, and HQ (leaders) are available. Modules are being developed to represent different time periods of war.
Harris is a strategy game based around the actions of RAF Bomber Command in the Second World War. In Harris, you take on the role of the Commander-in-Chief of Bomber Command, tasked with launching bombing raids against Nazi Germany. It is your responsibility to take the war to the enemy and destroy their capacity and will to wage war.