http://epfl.ysagoon.com/wiki//index.php
Globulation 2 is a free software RTS with an de-emphasis on micro management. It's still alpha, so 1. there aren't many people in the multiplayer lobby and 2. the AI seems to have end game issues. However, it is fully playable and is fairly mesmerizing, with a decent 7-map campaign that functions as a tutorial. If anyone wants to play a multiplayer match, drop me a line.
http://www.eurogamer.net/article.php?article_id=60187
The sequel to Black & White appears to have more of an RTS focus. Your creature will automatically try to do its duties. The player provides feedback rather than initiating each action.