Here a list of open source shell interfaces that you can access from the net.
Commander
MyShell
PHP Shell
PCom
Websh
Commander
The Commander is a web-based UNIX shell interface. From a web browser, this script allows you to run UNIX commands on your web host server (depending on the permissions set by your server administrator). This is particularly useful if your domain hosting provider does not allow telnet access. All you need to do is install the script in your CGI-BIN and call it from any web browser.
MyShell
MyShell is a web based shell interface that lets you execute arbiritary shell - commands, browse the filesystem and edit files on your remote webserver directly from your web browser. It has built-in password protection, directory protection, and command filter
PHP Shell
PHP Shell is basically a shell wrapped in a PHP script. It's a tool you can use to execute commands on your remote webserver, even if you can't have normal telnet-access. There are certain limits, but you get as close as you can get to having a telnet-connection to your webserver in a webpage.
PCom
Pcom is a PHP-driven webtelnet, that is a web interface to execute shell commands/external programs on a server without telnet access. It's useful when you need to perform shell actions nut you don't have access to a shell on the server. It can handle non-interactive sessions and interactive programs in background.
Websh
websh , the interactive web-based shell interface, hosted at http://www.zazzybob.com/websh.html. The version number of this document, indicated above, should always match the current version of websh hosted on the aforementioned site.