Those Are used:
1. Eigen - https://gitlab.com/libeigen/eigen/tree/master - 3.2.92 (EIGEN_WORLD_VERSION Macros.h)
2. nlohmann/json (https://github.com/nlohmann/json) - JSON for Modern C++ - 3.11.2
3. XGBoost - v0.82 (2019.03.03)
4. LightGBM - 2.2.3

Only when used in predictor:
1. R Earth (Multivariate Adaptive Regression Splines) - https://cran.r-project.org/web/packages/earth/index.html (Used only when predictor is mars - MedMars): 