Huge thanks to John for the heads up on David Koepp's script archive. Like John August, Koepp has posted what apprears to be his entire library of his scripts to the internet. This is an invaluable resource for screen writers as he has posted multiple drafts of incredibly popular movies where you can see the evolution of the script as well as see the difference between a spec script and a shooting script. I highly recommend checking out the early draft of Jurassic Park with his revision notes and compare to the final shooting draft.
There are a ton of scripts with multiple drafts including Mission Impossible, Carlito's Way, Zathura, Stir of Echos, Death Becomes Her, and much, much more!
- Don