Holo UI is a beautiful Sci-Fi UI for Unity.
The package contains custom scripts.
All the scripts are in C#.
The ui contains many custom elements such as:
Windows.
Radio toggles.
Small loading animation.
Big loading bar.
Tooltip box.
Navigation arrow buttons.
Three different size buttons (tiny, small and normal).
Icon buttons.
Table window.
Custom cursor.
PSD File included.
Live preview here.