This mod uses nice little pictures to decifer how much the unit/building/wonder you are about to build (i.e. in the queue list) costs, culture produced, upgradability, # of units that it can transport are all shown. it pretty much follows along the lines of Il Marfioso mod, but with pictures instead of bars.
The file listed is for 1.21f, for earlier versions: See the thread.
Version: 2.1.21
Size: 255