I just found this very useful tool from the Search Engine People blog. This excel file makes competitive research easier to do. You can see who are your strongest competitors as well as know how strong they are.
The best thing about the tool is that you can choose which web server you would want to use, which makes it very handy when you are doing international SEO and geo-targeting.
Thanks to Yoav Ezer for sharing this awesome tool.
How to Perform SEO Competitor Research with Excel | Search Engine People | Toronto.