GNU Privacy Guard (GnuPG or GPG) is a free software replacement for Symantecs PGP cryptographic software suite. Developed by The GnuPG Project
License: Open Source
AES Crypt is a straightforward file encryption tool using the AES algorithm, making it easy for users who need quick file encryption. In contrast, GnuPG offers a more robust system with additional features like digital signatures and public key management, but it requires a steeper learning curve.