Metaheuristic Optimization Using Population-Based Simulated Annealing

There are three (almost identical) versions, one in Python and two in C++:

Readme for the Python version.
Readme for the C++ versions (one using the Eigen library for linear algebra and the other using plain vanilla C++).

References

Wikipedia, "Simulated Annealing".
Kirkpatrick et al., 1983, "Optimization by Simulated Annealing", JSTOR.
Jamil and Yang, 2013, "A Literature Survey of Benchmark Functions For Global Optimization Problems", arVix.
Eigen template library for linear algebra.