This is my, as I like to call it, "Building" world - in it I use mods such as Too Many Items and Single-Player Commands to make it easier to build. Right now I've build:
1 house - 2 floors and an attic (almost unfurnished)
1 farm - Big Farm - serves no purpose but to look nicer
1 mine - not finished - wanna leave it to you
Mod testing grounds (don't use it if you want
A "beat machine" as I like to call it - you compose a track on it and it will repeat indefinately
A dock
__________________________________________________________________________________________________

That's all of the stuff that I've built - will post the download link as well!
Hope you like it and please, if you download it, use the beat machine!