During my PhD, I have coded a microkinetics simulation package in C++. All the microkinetics result in my thesis are performed using this program. The main benefit of the program is that you can easily construct your chemokinetic network using a simple input file. Because the program is built using C++, it is extremely fast, even on older machines. The program is still actively maintained and we are still adding new features. Due to the increase in popularity of the program, we have made a dedicated website for it.
The program is free to use and we provide plenty of tutorials and example to get your started.