ZipPassword is able to recover lost or forgotten password to pkzip/WinZip archives. Brute-force attack, "smart-force attack" and dictionary search are used to find out the password. ZipPassword features unprecedented search speed: up to 1,000,000,000 that is, up to one billion passwords per minute. As of now, it's the world fastest password recovery program, up to 3 times faster than the best competitors software.
Software that can be used as an alternative to ZipPassword: