VMAware
VM detection library in C++
...While there are many VM detection mechanisms that are already in use, VMAware features up to 80+ unique techniques to get the most accurate result possible.
On top of the library, there's a CLI tool that takes advantage of the full library (see screenshots)
It's also meant to be compatible with ARM, and 32-bit Windows, with C++11 support.
The library also has separate MIT and GPL compliant code, allowing for licensing flexibility among proprietary and open-source projects.