http://megaglest.org MegaGlest is a fork of the free RTS game, Glest. This project aims to improve the game and its content, especially when stabilzing multiplayer. It has a lot more content than the original game and contains bugfixes and improvements.
Videos showing the Dwarves faction of Glest.
Glest is a free RTS game: http://glest.org/en/index.php
Glest forums: http://glest.org/glest_board/