PDFUnlocker is a nice, free program only available for Windows, that belongs to the category Security software with subcategory Password (more specifically Revealers).
Windows Password Recovery
iAidsoft Windows Password Recovery is easy to use application to reset forgotten administrator and user passwords on Windows 7, Vista, and XP, without reformatting or reinstalling your system.
Windows Password Geeker Advanced
Windows Password Geeker Advanced is powerful Windows password recovery tool.
iSumsoft ZIP Password Refixer
You need ZIP password unlocker software to unlock ZIP password if forgot ZIP password unable to open your password protected ZIP file.
Windows Password Unlocker Standard
PC Spy Software
Most of the organizations give complete Internet access to their employees, so that they can check their emails, etc.
Asunsoft Excel Password Remover
Asunsoft Excel Password Remover is one of the fastest password recovery tool for removing Microsoft Excel password.
RAR Password Recovery
RAR Password Recovery is a rar password tool, which can recover lost or forgotten password for RAR archives created by WinRAR, RAR or other archives software.
iSumsoft Windows 7 Password Refixer
Appnimi ZIP Instant Unlocker
Appnimi ZIP Instant Password Unlocker can be used to unlock any password protected zip file instantly.
Asterisk Password Decryptor
Asterisk Password Decryptor is a powerful tool to recover lost or forgotten passwords.