Endlessh - SSH tarpit that very slowly sends an endless, random SSH banner.
SeKey - Use Touch ID / Secure Enclave for SSH Authentication.
BLESS - SSH Certificate Authority that runs as an AWS Lambda function and is used to sign SSH public keys.
sslh - Applicative Protocol Multiplexer (e.g. share SSH and HTTPS on the same port).
Eternal Terminal - Re-Connectable secure remote shell.
WebSSH - Web based ssh client.
jass - Tool to facilitate sharing of secrets using SSH keys.
rtop-bot - Bot for Remote Server Monitoring over SSH.
ssh-vault - Encrypt/decrypt using ssh keys.
sshcommand - Turn SSH into a thin client specifically for your app.
ssh-p2p - SSH p2p tunneling server and client.
xxh - Bring your favorite shell wherever you go through the ssh.
Smallstep - Single Sign-on SSH & Production Identity.