There are so many free keyword position checkers. Every one of them has their advantages and disadvantages.
-www.seoserp.com/web_tools/google_top_1000_serps_checker.asp
This checking tool is a great asset for webmasters. You can’t use this tool to keep the tracking history. But this tool helps to check ranking in different countries. It’s very rare to find a tool that can give ranking for several countries. You can check one keyword at one click.

-SEOBOOK
SEOBOOK keyword ranking checker is also a great tool to check ranking. But you can check ranking for USA and UK only from this tool. You have to install software to use this tool. You can track multiple key phrases at once.