Backlink Tracker

* Site Explorer - Yahoo's extensive backlink tracker tool. It has become the first choice of many who like to keep an eye on who's linking to them and how many links they have.
* Keyword Ranking - Digitalpoint's keyword tracking tool also has an option for you to look at how many backlinks your site has. It's a little hard to find, but it's there.
* Google "link:" query propend - By typing "link:" followed by a domain name like espn.com, you can see a sample of backlinks that Google knows link to that site. It should be noted that this is only a sample, not a complete list.
* Domain Stats - Looks at the top three search engines to see how many backlinks to your site are showing up in for each.
* Backlink Analyzer - Currently in beta, this is something that you have to install on your computer. It is a computer application that does not run through a website and you can feel safer that no one is spying on your data.