If you want better accuracy than a webcam but don't want the bulk of a Kinect, you can use The Setup:
While there isn't a direct "free version" of Driver4VR on GitHub, the open-source community has developed several high-quality alternatives that can get you tracked for $0 (provided you have the hardware). 1. KinectToVR (K2VR): The Community Gold Standard Driver4vr Free Github
However, if you are looking for on GitHub that achieve similar results (such as using a smartphone for body tracking), the most prominent feature found is: If you want better accuracy than a webcam
Searching for a "free" version of on GitHub typically leads to two types of results: unofficial repositories attempting to provide patched versions and legitimate open-source alternatives that offer similar functionality. Driver4VR on GitHub Driver4VR on GitHub Searching for "Driver4VR Free" often
Searching for "Driver4VR Free" often leads to sites claiming to offer cracked versions or keygens. Avoid these. Because VR drivers require deep access to your system's USB and camera protocols, running "cracked" versions from unverified sources is a massive security risk.