bill - 5:16 am on Mar 2, 2007 (gmt 0)
There are so many CMS programs out there that it would not make sense to have a single generator for them all. Some CMS packages have their own template packages. For example MovableType has their own style library [sixapart.com]. Other packages have their own. Not all CMS packages have this, so if that's an issue for you then you should check out their offerings in advance. The link dreamcatcher posted above is one of the best places to start.