A Simple and Efficient Framework for Infinite Resolution Simulation; provides a Java Thread-like class that executes over simulated time. Time units are user-definable, no time quanta, and neither changes to the VM nor pre-processing are required.
Mupisim is a simulator for distributed, mobile systems. Its primary purpose is the study of mobile processes (e.g. mobile agents) and their communication mechanisms. It may also be used to evaluate the efficiency of a given process migration scheme.