A simple, secure and modern encryption tool with small explicit keys, no config options, and UNIX-style composability. Tries to suck less than GnuPG. Tries to do the right thing only, without any configuration options or blinkylights. Encrypt-with-authentication, decrypt-with-authentication, that's it. Looks like it uses elliptic curve crypto. Written in Go.
Minisign is a dead simple tool to sign files and verify signatures. It is portable, lightweight, and uses the highly secure Ed25519 public-key signature system. Requires libsodium.