Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
Luksus - LUKSUS is a tool that creates an encrypted volume and filesystem on a hardrive or other storage...
R-Crypto - R-Crypto is smart data security and disk encryption software that allows you to secure your sensitive information via strong encryption.
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
Exocet - Exocet creates a Folder on your System.
LUKS - LUKS is the standard for Linux hard disk encryption.