Hello,
Jurassic Park? No Maya was not out at the time they used Softimage
and PowerAnimator
The Abyss? PowerAnimator
T2? Softimage and PowerAnimator
Star Wars ? Episode One - Softimage and Maya
The Mummy? Softimage and Maya
Final Fantasy Movie? Yes (modelling, animation, fx, previs - render [some])
Other CG movies? Antz (some modelling with PowerAnimator and Maya)
Shrek? Maya (modelling and cloth) and Softimage
Most of the film out there use multiple software depends from the productions, some use Maya more (HallowMan, Stuart Little [SPI is a big Maya house]) some other less.
Check the various web site and you'll find this kind of informations.
Most recent movie have more and more Maya used in.
Let me know if you need more information.
Later,
-a