Visualping - Visualping is the easiest to use website checker, webpage change monitoring, website change detector and website change alert software of the web. Read more about Visualping.
Wachete - Track web page changes and get notified. Free Sign-up. Have all data in one place
Update Scanner - Update Scanner is a Firefox extension to monitor web pages for updates.
Page Monitor - Stays in the background and monitors web pages for changes.
PageProbe - Automatic Page Monitor - Create automatic monitors for detecting and scanning changes on web pages, evaluate content based...
WebSite-Watcher - WebSite-Watcher detects website updates and highlights all changes in the text. WebSite-Watcher monitors web pages, password protected pages, disucssion forums and much more.