VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
Dekart Private Disk - Dekart Private Disk is a powerful disk encryption software with distinctive features and functions, combining robust NIST-licensed AES 256-bit encryption with a simple and straightforward interface.
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.
CryptoForge - CryptoForge is handy-to-use file encryption program for individual and organization to get a reliable safety.
Unicode Crypter - Encrypt and Decrypt Unicode!