Link popularity is a big factor in how well you rank in the search engines, particularly Google. Knowing how many sites link to you and, if possible, which specific sites are linking to you gives you the insight as to what needs to be done. Studying links pointing to your competition is also helpful.
A link popularity check is one of the best ways to identify and measure your web site's online awareness and overall visibility. To put it simply, link popularity refers to the total number of incoming links or "votes" that a search engine has found for your web site. Although a link popularity check can be done using most of the search engines (by typing in link:http://www.yourdomain.com), you might find these tools to be a little more helpful. Some of them even offer free comparison reports so you can identify better ranking strategies.
This free service allows you to query Google, Altavista, and Hotbot and reports on link popularity. The report comes back with separate information for each search engine giving you the possibility to compare your status in each.
Link Popularity Checker offers instant, online reports of a site's link popularity rating in 5 top search engines, including Google, MSN (Inktomi), AllTheWeb (FAST), AltaVista, & Teoma (Ask Jeeves) at no cost. You have the option of incorporating link popularity software tools for a fee, but it's not a necessity to use this popularity checker tool.
Marketleap's link popularity checker tool is designed to help web site owners to find who specifically is linking to their site, as well as to provide a useful benchmarking report which shows where your site stands in comparison to competitors and other major online destinations. Webmasters can also add this tool to their site.
Link Popularity Check Tool
This tool will show you how many other sites are linking to you. The more links to you the better your rankings will be in most search engines as most search engines use this data to calculate how popular your website is. You can even provide some competitors' URL's to compare your site to theirs. The results will be emailed to you, so be sure to provide a valid address.