Civ3Ext is a patch which adds a few extensions for Civ3 1.29f and PTW 1.27f, which is possible by accessing the memory space of the game. Civ3Ext won't modify any application file. In Civ3Ext 1.11, there are these extensions :
food/shields/beakers cascade
fast localization of cities which are going to riot or have just gained a citizen
no more limits for cities (it was 512) & units (4096)
evolving barbarians
corruption
See the readme for more information about each extension : ReadMe.txt
Version: 1.11
Size: 104