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
Distill Web Monitor - Distill is a web monitoring tool. It can monitor RSS feeds, a webpage or a part of webpage. Alerts in the form of pop-up, audio or emails can be received.
Page Monitor - Stays in the background and monitors web pages for changes.
Update Scanner - Update Scanner is a Firefox extension to monitor web pages for updates.
Feedfry - The easiest way to create an RSS feed from a web page.