I just stumbled upon a really nice looking Ribbon control built for Windows Forms, and it's Free, Open Source! This control isn't perfect, but it does work nice and looks great.
Go check it out: "A Professional Ribbon you will use" by Jose M Menendez Poó
70faed1b-6df7-42d6-b197-a35910caba89|4|5.0
General
.net framework, winforms