Unity3D + Kinect

Hey guys,

I'm new to the NUI's field... and I'm a little bit lost with the Kinect frameworks and its names and how to integrate them in Unity3D. i'm actually working on a kinect game with Unity3D engine, and i just need to understand the difference between:

-OpenNI & Kinect Official SDK & NITE & ZIGFU & Kinect Wrapper Package for Unity3D

Which one/ones should i use to make the Kinect work with the Unity3D, and how?

Cheers :)