The version number here is a typo ( I presume). AnyLogic's current version is 6.6, not 3.6. You can read a Features List here: http://alna.typepad.com
AnyLogic is the only simulation tool that works in all three major disciplines: Discrete Event, System Dynamics, and Agent-Based simulation. You can even combine these techniques in the same model to reduce "compromises" and "assumptions" and make your model's behavior closer to the system you are studying. It runs on Macs (and Windows and Linux).
There are other commercial Mac tools for System Dynamics, and open source tools for Agent Modeling, but AnyLogic is the only Mac software to run Discrete Event modeling -- the most common form of simulation to be found in the business world! And, by default, the only mac tool that can combine these methods into a model.
Being Java based it allows you to extend the application anywhere with your own code. YOu can even save and distribute your models as Java applets -- so your clients and colleagues can run them in any browser.
Supports 3D modeling, automatic documentation, modeling wizards, excel I/O, extensive graph outputs and libraries of intelligent objects which allow to build complex models with just drag and drop.
Because it has so many features it is hard to characterize -- it spans market segments occupied by both academic open-source tools as well as large scale commercial software.
But, as the name implies, it might be the only simulation and detailed quantification app you'll ever need.