Fantasy User Interfaces, Fictional User Interfaces, Fake User Interfaces, Futuristic User Interfaces. Regardless of what the F stands for, they all represent the same thing, the user interfaces and heads up displays found in many popular movies and television shows.
Most FUIs are not actual computer programs but simply animations being played back at the correct time or added in post production. These graphics and animations are designed in applications like Adobe Illustrator, Adobe After Effects and Maxon Cinema 4D.
Kit FUI is an IMDb-like database that makes it easy to find screenshots, videos and the designers of these FUIs.