Where can i get a key generator password cracker?

i stumbled accross a .zip archive that has alot of my old schoolwork and some stories i wrote. the damn thing is password protected, and i have no idea what the password is! so i've always wanted to use one of those super hacker programs where you run it and it guesses the password like 200 times a second... where can i get one of those? i have spent the last hour searching the internet to no avail. please help! other ideas appreciated as well.

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