.4UI File Extension
File TypeForeUI Plot File
What is a 4UI file?
Project file created by ForeUI, a user interface prototyping application; contains a "plot," which is a user interface mockup that contains layout elements; used for saving and loading interface projects.
ForeUI layouts can be exported to .PDF files as well as several raster image formats, such as .PNG, .JPG, and .GIF. They can also be exported to dynamic HTML (DHTML) for interactive Web browser prototyping.