PDF Encrypt allows you to encrypt (using standard 40-bit or 128-bit or AES encryption ) existing PDFs, set permissions, add user and owner password.

ShareCrypt has been designed to effectively and transparently encrypt shared network drives or folders by allowingsimultaneous data access to different users and preventing unauthorized access from non-authorized people

Powerful tool for creating and managing virtual encrypted disks (encrypted volumes). It creates encrypted volume within a file on a hard drive or any external data storage device (flash memory card, USB drive, etc) and then mount it as a real disk.