Jetico BCTextEncoder - Jetico BCTextEncoder is software that ensures your text-based communications are safe by allowing you to encrypt them.
Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
TheLetterEncrypter - TheLetterEncrypter is a small (14KB download) AES-based text-encryption program.
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.
GizmoMarks - GizmoMarks is software that provides secure block-notes by encrypting them in a way that nobody can understand.
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.