Web based SSH client to connect to different servers

In order to enhance my web application that provides free instant linux server - InstantServer, I would like the user to be able to open an SSH client within the browser, something in line with the mongodb terminal here.

I did my research and the closest matches were ajaxterm and Gateone. AjaxTerm has procedure listed to open SSH to a particular host whereas gateone requires a license.

Please suggest if any other reusable component already exists for my requirement.