Battle Realms: Zen Edition - still maintained, still patched, still evolving. Lost some piece of life on this game... (www.youtube.com)
MYTH II: Project Magma - I learned only recently, that the game is still supported by the dedicated fane and that they upkeep a multiplayer server for this terrific and unique RTS. (projectmagma.net)
Wargame Red Dragon - this game is... something entirely different. The camera movement and perspective it might deliver open the way to unique experience. (www.youtube.com)
Lambda Wars - free mod for Alien Swarm, that changes the setting to that of Half-Life. Damn entertaining thing... (www.youtube.com)
Grey Goo - at first it's your typical C&C/Starcraft clone. But then it turns out it's quite original game, with plenty of effort put into details. (www.youtube.com)
Battlezone Combat Commander - a remake of older title, it blends FPP with RTS. Quite fun, if one is ok with dated graphics. (www.youtube.com)
Populous: the beginning - I'm not sure whether it's 100% RTS, but the game was sweet back when it was still new. One of first "you're god" video games series. (www.youtube.com)
Stalin vs Martians - yes, there's a game like that. A series of games, more precisely. For all their cheap jokes, they are quite fun to play. (www.youtube.com)
Stronghold - the original one. It was one of attempts to bring D&D to PC. The game might be a bit confusing at first, because units aren't controlled but directed to a place on map. (www.youtube.com)
Kohan: Ahriman's Gift - if Master of Magic or Warlords were remade into RTS... (www.youtube.com)
Particle Fleet: Emergence - build and send self-repairing spaceships to destroy the threat that is, well, particles! (www.youtube.com)
Impossible Creatures - RTS where you create your armies by combining the "genes" of two different creatures. (www.youtube.com)
KKND remake - if you happen to posses the original game, then this project makes it possible to play it on more modern OpenRA engine (www.gamingonlinux.com)
Any RTS with a substantial "Supply Route" as part of the strategy?
So I played Hearts of Iron 3 and Factorio, both games having “supply routes” of some kind....
Planetary Annihilation - SF RTS, where you're able to destroy whole planets (planetaryannihilation.com)
Original War - all units are named instead of clones bought in local barracks, no new units may be trained, buildings and vehicles need to manned, there's time travel. This game is damn original. (www.youtube.com)
Paraworld - two words: dinosaurs, man! (www.youtube.com)
What RTS games do you play on console? (www.thegamer.com)
Does the RTS genre need saving? An interesting take on RTS and its evolution (youtu.be)
A worthwhile watch. An interesting perspective where RTS still exist, thriving; just not in the form we used to play.