tmate - Tmate is a instant terminal sharing based on ssh.
Wetty - Terminal over HTTP and HTTPS.
ngrok - ngrok enables secure introspectable tunnels to localhost webhook development tool and debugging tool.
Shell In A Box - Shell In A Box is a web based AJAX terminal emulator that can export arbitrary command line tools...
Gotty - GoTTY is a simple command line tool that turns your CLI tools into web applications.
Bastillion - Bastillion is an open-source web-based SSH console that centrally manages administrative access to systems.