This widget will display the status of any server running on any tcp port. It will display if the server is online or offline, and if the server is online it will also display the ping to the server when you go over the icon with the mouse. The widget is very easy to customize as it is styled with an external css style.
The widget only works with tcp connections, udp connections will always be displayed as offline. If you want to be sure that your server will work with this widget, you can test this on this page.