PDF Password Cracker can be used to decrypt protected Adobe Acrobat PDF files, which have "owner" password and "user" password set. It has Key search attack, which guarantees the decryption of PDF files that use 40-bit encryption.
Office Multi-document Password Cracker provides a simple solution to remove any password (excepting VBA password) from multiple MS Word and Excel documents. Just a couple of mouse clicks and a whole batch of files are automatically unprotected.