I think Folder Organizer is the pay-for version of Apps Organizer. They have the same author.
I personally bought Folder Organizer and LOVE it. Much like the previous poster says, you can use icon packs to customize icons, group apps in folders and put those folders on your desktop.
The big diff between an average folder and F.O. is that you can add items to the folders via the app itself. You don't need to add them to the desktop and drag them to the folder. I have a screen or two with no left over real estate space so it's nice to have this feature.