fcrackzip searches each zipfile given for encrypted files and tries to guess the password. All files must be encrypted with the same password, the more files you provide, the better.
Marc Lehmann releases an Open source zip password cracker, but it only have source and a very old windows version 0.3, so I compiled it under MSys and MingW, you can download the last version(fcrackzip-1.0-win32.zip) now.
for more info about fcrackzip, please visit FCrackZip manual
or Marc Lehmann’s “FCrackZip”