SiteChecker

Continuously monitor state of all your pages.

SiteChecker is a URL monitoring service that checks your URL's at regular intervals and notifies you via email when your page is not alive. It will alert you immediately upon your URL accessibility or availability problems. It works in background all the time. If you want to open the window, simply click on tray icon.

You can use it to monitor websites or servers.
To use notification configure sender!

Application is not finished - there will be new features.