Wetty - Terminal over HTTP and HTTPS.
Pisth - Pisth is an open source SSH and SFTP client for iOS.
Bastillion - Bastillion is an open-source web-based SSH console that centrally manages administrative access to systems.
Dataplicity - Dataplicity is a remote terminal for your Pi.
SSHy - SSHy is a HTML5 SSHv2 web client implementing E2E encryption that runs well on modern web browsers.
Prompt 2 by Panic - The best SSH client for iOS