I will be grateful if you will point me to published examples of elegant and sophisticated SW models.

My interest is in the core of SW.  That excludes add-ons like presentation, collaboration and legacy interface; and specialties like sheetmetal and pipe routing.

I am looking for models that push the limits of SW tools, not the capacity of the computer.

You know your model is elegant when others look at it and say "Why didn't I think of that?"

I hope to learn by performing autopsies of such models.

I am hoping that there will be some that include multi body parts and mechanisms.