ZipCracker
http://zipcracker.sourceforge.net/
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What is ZipCracker

  ZipCracker is a program that helps users recover their files from password
  protected zip archives, when the user has forgotten the
  password. ZipCracker uses brute force to find the password.

Features:

* BeoWulf cluster support (optional).
* Easy to use Gnome UI. 
* Fast and powerfull cracking engine 
* Extra fast cracking of known filetypes 
* It's free (GPL). 
* More to come. 

Requirement:

* Gnome 1.0 or greater 
* ZLib 1.1.3 or greater patched with the patch from the zipcracker homepage
* PVM 3.4.2 or greater for BeoWulf cluster support (optional).

Installation:

Don't forget to patch zlib!

  ./configure
  ./configure --without-pvm (if you have PVM installed, 
                             but you don't wan't to use it).
  
  make
  
  make install
  
