NetCrypt

NetCrypt is a small Open Source command line file-transfer utility providing authentication, confidentiality and integrity validation while still maintaining top-notch performance and transfer speed between machines. No public key distribution is required: NetCrypt is designed to use a symmetric passphrase with a strong key-derivation-function.
NetCrypt seeks to fulfill all those requirements.
In it's default configuration, it uses the AES-256-GCM cipher with a PBKDF2 key iteration count of 32000 rounds.

NetCrypt is an secure alternative to netcat, but might also supplement SFTP or SSH for file-transfer.