The benchmarks are a bit outdated which makes them less useful for choosing a framework.

Event module currently lacks a convenience plugin wrapper.

When world.dispose() is called should close the EntityTrackerMainWindow.
I think entityTrackerMainWindow.disconnected() shold be called too.

EntityTracker {
   ...
   @Override
   public void disposed() {
      updateListener.disposed();
   }

}

WorldUpdateListener {
   ...
   void disposed();
}

EntityTrackerMainWindow {
   ...
   @Override
   public void disposed()