How can i get NGUI or UI in my project ?

Questions & Answers
1

How can i get NGUI or UI in my project ? and where can i fine it ?

2

NGUI is a paid Asset. You buy that on the Asset store:

Window->Asset Store (or Ctrl+9). Search for NGUI, it’ll be the first result.

You don’t have to use NGUI to get UI, though. You can use the new GUI system that’s coming out in Unity 4.6 if you’re running the beta, or you can use the existing OnGUI framework if you’re running one of the < 4.6 releases.

See here for a tutorial for the new system:

And here for a tutorial for the old: