Kryptor

Kryptor is a small command-line tool for encrypting and signing files, built by UK developer Samuel Lucas as a friendlier alternative to GPG. It uses modern, well-regarded primitives from libsodium (XChaCha20-Poly1305, Argon2id and Ed25519) with almost no options to get wrong and it can optionally encrypt filenames. You can encrypt with a password or with public keys, which makes it handy for sending files to someone else. It is open source under the GPL, though as a single-maintainer project it has not had a formal independent audit of its own code and instead leans on the audited libsodium underneath. Pick it if you want straightforward, modern file encryption from the terminal without GnuPG’s complexity.