Yahoo Site Explorer provides a more consistent, quantitative report, when it comes to sites linking to your website or blog. Many people tend to use Google Webmaster Tools, which only shows a fraction of inbound (backlinks) to your website. All you need to do is enter your URL in the search box and click on Explore URL.

Free Backlink Tool

The only problem with Yahoo Site Explorer, it doesn’t provide information about the quality of the sites linking to your site. The SEOmoz Linkscape tool retrieves information on the amount of quality links pointing to your site. In order to get this information you will need to set up an account, which is free. If you want even more details, you would need to upgrade to PRO.

SEOmoz tool crawls the web every 4 to 6 weeks.

In summary, use the Yahoo Site Explorer for link popularity and SEOmoz tool for information on the quality of links pointing to your site.