Divil has updated his excellent UI controls
for .Net. These controls totally blew me away, much more
easy to use and way better looking than some commercial
controls, and the prices are simply amazing. It's free for
non-profit use. The controls include Menu and toolbars which
can be docked to any side and have custom renderers, Docking
window controls, outlook bar etc. This guy is really a guru
of windows forms control development.