gpg

GNU Privacy Guard (GnuPG or GPG) is a free-software replacement for Symantec's PGP cryptographic software suite.

A secure solution for file and email encryption.

A modern, cross-platform, open-source GUI for OpenPGP encryption.

Git identity manager - never commit with the wrong identity again

Transparent file encryption in git, so encrypted files show up as normal files to other users.

gopass is a simple but powerful password manager for your terminal

Local OpenPGP tool for key management, file and text encryption, signing and verification.

A dead-simple tool to sign files and verify digital signatures.

A multi-platform GUI for pass, the standard unix password manager.