GuiXT

GuiXT is a client–server] system that provides user interface customization to SAP solutions. While designed specifically for use with SAP software, and completely integrated with SAP, GuiXT solutions operate independently of SAP solutions. That enables firms to tailor “do-everything” SAP transaction screens to the narrower requirements of specific jobs within their organizations while leaving essential SAP coding untouched. The “hands-off” design simplifies development and testing significantly. GuiXT Solutions users report greatly improved productivity and accuracy while, at the same time, reducing training and support costs.

The link address is:
http://en.wikipedia.org/wiki/GuiXT