Yes, Lite is free version. FUI is a "pixel perfect" 3D GUI. It doesn't use any realtime 2D functions, so it doesn't have the slowdown that you get when you have 2D on 3D. The GUI is very complete, lots of gadgets and a couple of optional Win32 Dialogs.
FUI BlowS!
Take it from a former customer.
Use FUI and expect the following:
Your the bug tester!
Report a bug and your asked to modify your FUI library to fix.
Search the FUI forums for a huge list of modifications you have to make to the FUI library just to get it to work correctly.
Excuses from the developer on how busy he is with other things and doens't really have the time to support the software (but you'll pay for it regardless).
The Gui itself is slow, clunky, and not pixel perfect by any means.
After purchasing it I dropped it, very unhappy. I tried out XLNT2 and bought it afterwards.. Since everyone is spouting high reviews of BlitzUI I think I will try that and see if it's better then XLNT.