Smart Shortcuts keep HTC EVO home screens organized
You can already create various folders on your HTC EVO home screens using the standard "long press -> Folder" method, but if you want something with more options, then you should take a look at Smart Shortcuts.
On the surface, it looks like nothing more than basic folders that let you use different icons, but there's more to the app than that because it also supports second-level organization based on tags. For example, you can have a general Applications shortcut that contains shortcuts inside it for categories like games, multimedia, tools, etc. You can also set things up like regular folders housing apps, bookmarks, or contacts.
Paired with Multicon and/or Launch-X Pro, Smart Shortcuts is a simple way to keep your home screens organized and easy to manage.