Talkwalker Alerts - Better than Google Alerts

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.

Clatters - iOS app to monitor your brand on Social Media

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.

Intutel - Intutel is a market intelligence cloud - a suite of monitoring & analytics tools to help brands/ marketers / market research companies

Update Scanner - Update Scanner is a Firefox extension to monitor web pages for updates.