Ngal is a project mainly written in C++ and C, it's free.
A simple C++ Genetic Algorithm Library
A C++ genetic algorithm library. This code is super old and likely of little use to anyone, however it was an indication that at some point in my life I actually knew a little bit more about C++ than I do now, and I'd like to remember that fact for later on when I've lost all comprehension of it again.
If this is of any use to you, let me know.