During the long time of polymake development several perl modules were created which have nothing to do with polytopes or some other mathematical objects. Their aim is to accelerate the development and increase the performance of both the polymake core and the application code. If you are going to develop non-trivial rule routines in perl or create an interface to a new visualization engine, you should have a glance at the following chapters, as some of the components presented here have an impact on every piece of perl code included in polymake.