Aaron Wall of SEOBook has released a new SEO tool called Rank Checker. This tool allows you to easily track your rankings and rank changes on Google, Yahoo and Microsoft Live Search (MSN).

This free tool is packaged as a Firefox extension, making it quite reliable. You can manually check rankings for a list of keywords, and can even setup scheduled tasks to automatically fetch rankings at specified times and intervals.

This tool saves me a lot of time since I used to do this task manually. Digital Point provides a similar tool accessed through a web interface. However, it does not provide data from Google unless you own a now discontinued Google SOAP API Key.