KeePass - KeePass is an open source password manager. Passwords can be stored in highly-encrypted databases, which can be unlocked with one master password or key file.
Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
Passbook - Password manager for GNOME desktop, Gnome Keyring Manager and Viewer
Advanced File Security Basic - Download Advanced File Security Basic. Protect files by encrypting them with a strong password, a series of questions, or even an USB key you can carry around with this powerful security solution
Seahorse - Front end for GnuPG.
Exocet - Exocet creates a Folder on your System.