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.
Star Wars Spring offers the ability to engage in huge battles with hundreds, if not thousands of units on each side - on ground battles, at sea (with repulsorlifts), and in the air, where aircraft will dogfight for supremacy of the skies - which you'll need to rip up enemy ground forces with bombers and gunships.
Whoo! (I can see my transport thing in there!)
There's more then just one unit you've modelled in that pic. I can see atleast three ;)