CC3 stands for Campaign cartographer 3 and is a mapping program from profantasy.com (head over to their site and have a look). There are numerous programs in the CC3 family. First yo uhave to buy CC3, that let you create overland maps. You can then buy the addons like City Designer 3 (CD3) that let you make city maps, Dungeon Designer 3 (DD3) that let you create dungeon and floor pan maps etc. The program itself is based on the fastcad program and mainly works with vector graphics. It is a neat little program I must say, even though I like to do some touch up of my CC3 maps in photoshop.