Apolyton Civilization Site-CTP
            THE BEST CTP SITE ANYWHERE!!! Also has sections for other TBS games including Civ2 and SMAC, a massive number of files to download, news and info about the games, and a big message board. If you can't find what you need at this site, you probably won't find it anywhere.
           Activision's official CTP site
            The official site for CTP, it has news about updates and stuff related to the game, some downloads, and info.