FreeCol
From PardusWiki
FreeCol is a clone of Sid Meier's Colonization. Released under the GNU General Public License, FreeCol is free software.
FreeCol is mostly programmed in Java and should thus be platform-independent. In practice, it is known to run on Linux and Windows, as well as Mac OS X (with some limitations).
In February 2007 it was SourceForge.net's Project of the Month.