Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
Exocet - Exocet creates a Folder on your System.
File Lock PEA - Password-encryption of files and directories. File PEA encrypts files and folders with authenticated encryption to protect confidentiality and integrity. The program uses memory-hard key derivation functions to prevent custom hardware attacks.
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.