We've moved to GitHub to manage the project in terms of sourcecode versioning and issue tracking.
While Newton Dynamics is a mature and stable library we currently do not provide precompiled binaries, but will reintroduce them soon.
But compiling Newton Dynamics is incredibly easy as we provide project files for nearly every major platform and multiple IDE versions for each platform.
Users of Newton Dynamics are currently using the physics engine on a range of platforms from 32bit and 64bit desktop systems (OSX, Windows, Linux), ARM based embedded devices to smartphones like iPhones and Androids. Consoles are also supported with some users using Newton Dynamics on next generation consoles like the Xbox One or the PS4.
GitHub also provides a direct ZIP download link that will provide you with a snapshot of the repository without having to install GitHub.