What are some well designed Windows apps?

Windows is my daily computing driver, but I feel that the programs I use on it just aren't as good as the programs I use on other operating systems. Ubuntu has superior command line utilities, while Mac OS X has a near monopoly on good graphical design. I'm getting tired of looking at terrible icons and mangled ribbon menus all day, what are some programs that are a pleasure to look at and feel native to Windows?

The Zune application is a good example of the type of program I'm looking for—it's a powerful application with a strong aesthetic I appreciate.