Mirror sites all over the world. Catagorized, and a what's new list - updated daily. One of the first good ones, and still one of the best. You must try this site. Besides, we like their ducks.
Screen shots available of some programs.
Another great site. Lots of catagories. Top ten downloads. If you have Windows 95, this is the definitive site for shareware, freeware, and demos. Catagorized very well.