Vista Start Menu

A convenient alternative to the Start menu for starting programs quickly (go to 'free software').

http://www.vistastartmenu.com/index.html

Tidy Start Menu

As time goes by, the list of programs in the Start Menu can become too long. As a result, each time you want to launch a program, it takes too much time to find it in the menu. The "Tidy Start Menu" program will help you to put the menu in order and make your work comfortable. For setting the menu in order, the program offers you to categorization features. For example, the Internet programs can be put into the "Internet" category, while all games can be included in the "Games" category.

http://www.tidystartmenu.com/index.shtml