[xoroshiro]

Oh, wow. I couldn't really figure out which parts of AMPL were proprietary and I guess I immediately dismissed it after that without understanding how it worked.

As for Pyomo, while at first glance I dislike the syntax (it's not as easy to share with others, at least compared to something like GNU MathProg, where the receiver doesn't need to concern themselves with python or julia), I like python enough to maybe give it a try. I'll have to learn more about it though. Thanks to you and the others!