OpenPGP - The most widely used email encryption standard. Defined in RFC 4880.
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
iGPMail - iPGMail: OpenPGP Email security for iPhone and iPad
ComplyCube - Verify your customers in under 15 seconds anywhere in the world with a cutting-edge SaaS & API platform for Identity Verification and AML/KYC compliance.
jCardSim - jCardSim is an open source simulator implements Java Card, v.2.2.1: - javacard.framework.*