Both fo the sites mentioend above are good for getting software at K-12 rate given a xerox of a student id or program. The license will say that you can't use it for commercial purposes, but its fine for doing the school
play or what have you. I tend to agree with Dave - it's not worth your trouble being a pirate and downloading the software that way. By the time you find it, download it, figure out hwo to install it, clean up any mess it makes, and so forth, you'll likely have expended more of your time in dollars than the cost of the program...