Security

002

002 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.
NOTE: 002 will only work on a Windows system.
http://www.002.ca/
Download:
https://www.xint.com/002/send.php

VGP - Very Good Privacy

Want to encrypt the text of an email you are about to send or any other text. VGP - Very Good Privacy originally used the Blowfish encryption algorithm back in the early 90's. It has been one of the most secure and successful methods for managing private email. VGP is web based using SSL site security and 256 bit AES encryption.
Use VGP:
https://www.xint.com/vgp

NOTE: Download a single file - vgp-aes.htm - for your own OFFLINE version of VGP
Download:
https://xint.com/vgp/vgp-aes.htm

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/
Download:
https://www.aescrypt.com/download/

7-ZIP & 7-Zip Portable

What if you want to send sensitive information or file to someone via email and they have no encryption software installed? 7-Zip can create a self-extracting encrypted file you can send via email. All the recipient needs is the password to open the file. For Windows but works on Linux using WINE. On Linux use the portable app.
https://7-zip.org/
Download Installer:
https://7-zip.org/download.html
Download Portable:
https://portableapps.com/apps/utilities/7-zip_portable

NOTE: To create a self-extracting (SFX) file, the archive type must be set to 7z