[Open Biometrics](http://openbiometrics.org) is a communal biometrics framework supporting the development of open algorithms and reproducible evaluations. (Their use of mugshots is entirely unfortunate.) OpenBR is “supported on Windows, Mac OS X, and Debian Linux. The project is licensed under Apache 2.0 and releases follow the Semantic Versioning convention. Internally the code base uses the CMake build system and requires Qt and OpenCV.”
It’s on [GitHub](https://github.com/biometrics/openbr).