Everything from single-screen shooters to artillery duels. Neopede is the space one and is older in spirit than it looks. Battle of Antarctica and More Than Tank: Level Pack are about angles and arcs rather than reflexes. American Tank: Zombie Invasion is exactly what the title promises. Overlaps heavily with action, but the games here are specifically about aiming.
114 games, free to play in the browser.
These run on their own, without Flash — all 222 of them.