GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
jCardSim - jCardSim is an open source simulator implements Java Card, v.2.2.1: - javacard.framework.*
Kleopatra - Kleopatra is a certificate manager and GUI for GnuPG.
Cryptkeeper - Cryptkeeper is a Linux system tray applet that manages EncFS encrypted folders.
Cryptomator - When it comes to saving your files on a cloud server, it is important to ensure the security of those files. Keeping your delicate files out of the wrong hands can save you a lot of time and hassle. Read more about Cryptomator.