The expansions come with a good number of fun mods. Since I haven't used the original in a while now, I couldn't honestly tell you what's out there.
Seriously, the second expansion comes with a mod that completely overhauls the aesthetics and turns it into a space-based mod more in the vein of GalCivII. Called 'Final Frontier'. It's pretty cool, each star is a single "city", and within it you can select different planets (with varying food/coin/hammer values) to build improvements on, as well as shift population around at whim. It's pretty darn sexy, even though it takes forever to play.
Look, surely you can find some way to get your hands on the expansions. Capiche?
