In the payware department, look at Aerosoft's AES package.  It adds animated marshallers, docking system displays, a follow me car, walking ground crew, moving jetways, moving airstairs, moving baggage, cleaning, and fuel vehicles, a pushback tug, and an assortment of boarding sounds.

This is only for YOUR aircraft... it does not affect the AI planes.

Also, it is only for a select set of payware and freeware airports.  The complete list of the airports it currently works at is on Aerosoft's website.

Someone else will have to help you for any freeware possibilities.

best,

............john