openkinect/libfreenect is a user-space driver and library for accessing Microsoft Kinect. The repository's latest release is v0.6.4. However, the provided materials contain no information about what changed in this version, so the specific changes in the release cannot be confirmed. The repository description states that it provides drivers and libraries for Windows, Linux, and OS X.
This project makes the hardware features of the first-generation Kinect available to programs. It supports RGB images and depth images, the motor, the accelerometer, the LED, and audio. Depth images store the distance measured by the camera for each pixel. It can be built with CMake and also provides interfaces for several languages. With fakenect, Kinect sessions can be recorded and replayed, so it also applies to handling recorded sessions without the actual device. The README directs users to the separate project OpenKinect/libfreenect2 for the Xbox One's Kinect v2.
The verifiable scope is limited to the features and supported targets listed in the documentation. The provided materials do not state the license or the change log for v0.6.4. Therefore, what improved in this release and whether the license fits your intended use cannot be judged from this information alone. Kinect v2 support is also outside the scope of this repository, so this is a project where you need to first confirm whether your actual target is the first generation.