Creeper is a Java MVC framework for those who want to create multi-agent simulations (or games) and need something to build on. Creeper takes care of effective updating and rendering. You only need to specify the world objects and how they should look like.

I have done a few updates that allow your application to be called with parameters from the command line and did a number of improvements as well. Creeper is now a much stronger framework that I just used for my swarm robotics simulation project.