Which is the most intuitive to perform Dynamic Monte Carlo calculations?
If you want to perform Kinetic Monte Carlo for a chemical reaction system, you can use ZACROS. I am not sure what your system is? You should follow some good text book like "Understanding Molecular Simulation" to identify the type of your problem and appropriate software for that. There are plenty of freely available code on the internet but they all are for some specific purpose, So basically it is your responsibility to choose the best available software that will suit your need.