Thanks to BluesNews for the linkage on this free RTS.

"The Warzone 2100 Resurrection Project aims to continue the vision of Pumpkin studios started in 1999 with the game Warzone 2100, which was closed source until Dec 6, 2004 when it was let out the doors for the first time to the public under the GNU General Public License (GPL), by its copyright holders Eidos-Interactive™."