Advanced PDF Password Recovery
Software to decrypt protected Adobe Acrobat PDF files (with standard security handler or FileOpen plug-in). Decryption is performed instantly and can operate in a batch mode.
Digital Delivery
Secure electronic software and information distribution. Prevents unauthorised reading and copying of files. Evaluation version available.
FileOpen Systems Inc.
A plugin to Adobe Acrobat that helps ensure that a digital publication is not redistributed or uploaded to another website.
Guaranteed Pdf Decryptor
A utility to decrypt any password-protected PDF files with guarantee, regardless of password used. Demo available.
ITEKSOFT
eDocPrinter and eDocProcessor applications, that encrypt and print PDF, optimizing it beforehand.
Kyler Laird's PDF utilities
Provides tips on removing security protections from files.