It has been a while, but I finally made a new version (3.0) of the NEAT algorithm and its associated visualization system.
I made this new version mostly since I need it for a new AI experiment I am working on
I have mostly just updated the code to use more modern C++.
Download link is in the original post.
I will probably eventually release a large AI library with various techniques I have come up over the years, but for now here is NEAT standalone.