Tab menus are a fairly common thing that I use in a lot of my applications. I like tabs because they help break up large chunks of, usually, related information.

At work we use RadControls for Telerik and they have a pretty nice tab menu control that is easy to use and looks good too. The only problem with these controls is that they only work in WebForms like even the default ASP.NET controls. So when I started playing with MVC I quickly realized I would need to spend some time building some of these controls myself.