The Secure Shell Chrome Extension is actually quite different than what is being offered here. The Chrome extensions is effectively a SSH client, like PuTTY, in a browser. You still need a network path to the host.

Onion Terminal is a HTTP server that serves a Javascript-powered terminal connected to the box through HTTP in your browser.

The benefit of the latter is you can get a shell on your box behind a restrictive firewall where only HTTP(S) traffic is allowed.

There is a big difference (which I dont know if its good for oterm): Oterm does not use ssh at all. It is like xterm, but does not use X as protocol, but https.

Best one by far and it's from google employees

Oh nice!