MUI (Magic User Interface)

MUI (Magic User Interface) is a Workbench interface enhancement utility.

MUI is an object oriented system to create and maintain graphical user interfaces. Programmers save a great amount of work and benefit from MUI's powerful object collection, users get the possibility to customize nearly every pixel of an applications look according to their personal taste. During the last years, MUI has established itself as a standard for graphical user interfaces on the Amiga. Since its first release in 1993, lots of experienced programmers have contributed to the success by releasing hundreds of MUI based applications. 

Shareware restrictions

The demo version of MUI is available for free download below. It is fully functional and sufficient to run any MUI application. However, MUI's advanced configuration options for user interface design are not available unless you are personally registered.  And although development of MUI stopped in 2003 you can still officially register MUI to unlock the options for user interface design at the official MUI webiste http://www.sasg.com/mui/