Great Free SEO Tool

I discovered a great free tool for internet marketers or anyone wanting to check their Google ranking. By Google ranking I don't mean the page rank number that you find in the Google tool bar, but where you are on the search results page. For instance, if you are fifth from the top your rank would be "5." If you are fifth from the top on the second page your rank would be "15." This tool tracks that ranking over time. If you have a lot of sites you're trying to track, it comes in very useful. The tool is called Rank Checker Ace which is also the domain: http://rankcheckerace.com.

Rank Checker Ace has a simple, easy to use interface:

To add a site, all you do is click "New Url" then fill in the details of Url name, keywords, search engines such as Google or Bing you want to track for.  Here is a how-to on how to add a site you want to track.  Here is their complete how-to guide.

If you like the tool, you consider donating to it.  I did.

Update:
Please note that after I wrote this post Rank Checker Ace became Pro Rank Tracker.   It still is free but only for up to 50 terms, and it still is a great tool to check your rankings.  I am going to pay because I use it so much.