Security

002

002 is an update of Parisien Encryption Tools (PET) and is a file encryption system that uses the AES Encryption Algorithm. It includes a Secure File Wipe utility for permanently removing files. Available also as a portable application.
http://www.002.ca/
Download
https://www.xint.com/002/send.php

Passwordsafe

Secure password storage, Blowfish encryption.
https://pwsafe.org/
Project pages on Sourceforge
http://sourceforge.net/projects/passwordsafe/
Download:
http://sourceforge.net/projects/passwordsafe/files/

AESCrypt

AES Crypt is a file encryption software available on Linux/Mac/Windows that uses the industry standard Advanced Encryption Standard (AES) to easily and securely encrypt files.
https://www.aescrypt.com/
https://www.aescrypt.com/download/

Silver Key Free Edition

What if you want to send sensitive information to someone via email and they have no encryption software installed? Free Silver Key  creates a self-extracting encrypted file you can send via email. All the recipient needs is the password to open the file. Both an installable and a portable version are available.
http://www.kryptel.com/products/freesoftware.php
Download
http://www.kryptel.com/download/