Star Wars: Imperial Winter is a free, multi-platform, real time strategy game using the open-source Spring RTS engine. Featuring over a hundred different units for the Galactic Empire and Rebel Alliance, spanning from The Phantom Menace to Return of the Jedi, SW:IW aims to not only contain the best gameplay of any Star Wars RTS, but the most diverse cast of units, including: Stormtroopers, TIE Fighters, X-Wings, stealthy Rebel Commandos, Bothan spies, Royal Guards, Wookiees, "reactivated" Battle Droids, repulsorlift tanks, walkers, and more! Gameplay features include asymmetrical balance, with the two factions playing very differently from each other; territory-based constant-income resource system allowing a fluid economy rather than paying upfront; realistic weapon physics, with every single projectile's path is realistically calculated, meaning your men can hide behind a hill from enemy laser fire but not from an artillery cannon, and many other features.
Apart from being generally badass whilst toting a heavy repeating blaster, the darktroopers also have JETPACKS that allow them to fly very short distances. Remember that Spring is fully 3D and has real physics, so that means they can jump over obstacles, jump up or down cliffs and over water/lava/etc. It also means they can be shot at and killed in the air (easy targets for fighters!) - as well as firing at targets on the ground whilst in flight themselves!
DoW-like...nice!