Check out
http://mods.moddb.com/.
I haven't played many TC's since the original Halflife so I am a bit behind on what's new or worth playing but this site will give you and idea of what's out there for just about any moddable game and it's progress. I know it's not exactly what you were looking for as I don't have any recommendations for you and it unfortunately doesn't seperate regular mods from TC's but at least you can see what's available.