PHPterm is a terminal/shell emulator for PHP which let's you execute shell commands just like in a shell, but all within your browser window over the HTTP protocol. It aims to provide the look and feel of konsole, the KDE terminal.
An Ajax/PHP WebShell to command your webserver from any computer. Supports password-protection, very fast interface, never reload the page, history item of commands, easy custom-command adding, quick commands, tabs, upload function, file browser ...
Discuz! Command Prompt is a plugin for Discuz! forum system that emulates the famous DOS environment, written using AJAX and PHP.
cgi::shell is a perl script which hopes to provide webmasters with an ability to access simple shell-based commands on the webserver.