SimPack is a collection of C++ tools (routines and programs) for computer simulation. The purpose of SimPack is to provide people with a "starting point" for simulating a system. The intention is that people will view what exists as a template (or "seed") and then "grow a simulation program." SimPack tools have been used for six years of teaching computer simulation at the under- graduate (senior) and graduate levels. Also, many people have taken the basic tools and created more complex research applications with lots of options specific to a particular area.