Web Console is a web-based application that allows to execute shell commands on a server directly from a browser. The application is very light, does not require any database and can be installed in about 3 minutes.
PHP tools for developers and system administrators
The PHP Toolbox is an extensible, cross-browser script written in PHP for developers and system administrators. It was designed for rapid deployment to provide the user with on-demand tools for common server-side tasks. (http://www.phptoolbox.org)
ajaxPHPterm is an AJAX terminal/shell emulator for PHP, based on the PHPterm project. It acts as a terminal and allows you to execute shell commands within your browser, even in a hosted environment. Added AJAX makes it behave more like a real shell.