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.
Update Scanner is a Firefox extension to monitor web pages for updates. Useful for websites that dont provide Atom or RSS feeds.
WebSite-Watcher detects website updates and highlights all changes in the text. WebSite-Watcher monitors web pages, password protected pages, discussion forums and much more.
Track web page changes and get notified. Free Sign-up. Have all data in one place
Follow That Page sends you an email when your favorite web pages have changed. The free version can perform 20 daily checks and 1 hourly check. You can enter any number of pages you like, but after checking 20 pages (in the daily run) it will stop and leave the rest for the next...
Track web page changes in any web page daily for free users, every 30 minutes for paid users - no RSS or Atom required. Receive notifications via email, Instant Message, and SMS.
Versionista is an online service that alerts you when a Web site changes. It shows you what's been added & removed to any Web page. It records a full page screenshot, and lets you use powerful inclusion/exclusion filters.
Description by owner: "Monitors your website/server for free, 30 seconds interval. Complete delivery test for e-mail servers (sends an e-mail, waits for it to arrive). Alerts via SMS/e-mail. Worldwide network.
Write your own scripts and execute when servers goes down (and u.