This is a post by Cat McClintock on PTC site.
If you’re using PTC Creo, you already enjoy great benefits from the ground-breaking parametric design solution. But you should also know that many companies don’t stop there. They add on tools that suit their specific company needs, refining and optimizing the software environment so that they can develop products that are even more innovative and efficient. They add on tools like PTC Creo Advanced Assembly Extension (AAX).