The Kinect and Natural User Interface enables users to control an app by using gestures and voice commands rather than handheld controllers.
NUIView
Provides visualizations of NUI streams, records and plays back Xbox raw and event files, and identifies enrolled users.
SpeechLab
SpeechLab is a suite of tools to help with Xbox speech development.
VGB - Visual Gesture Builder
Generates data used to perform gesture detection and tracking at run time.
VgbView - Visual Gesture Builder View
Describes VgbView, a tool that allows viewing a gesture database in real time.
Kinect Studio
Kinect Studio is a utility app on the development computer, used to preview sensor data, record and play Xbox Event File (XEF) files, control the timeline position, and select 2D or 3D view. KStudio APIs enable you to develop custom tools on the devkit and on the development PC, to record and play back skeleton data using XEF files.
KSConvert - Kinect Studio Clip Conversion Tool
Converts raw data into processed data; also updates data from an older format into the current format.
Xbox Prepare Grammar tool (xbpg.exe)
Creates a CFG binary grammar from an input GRXML format grammar.