If you want to know the other site what can make our site get backlink for get PR... I Think you must try this add-on for firefox... you can see who have BACKLINK or not... Yeah the name add ons is Seoquake
you can download <="<">href="https://addons.mozilla.org/en-US/firefox/addon/3036" target="_blank">here Beginner web masters and seos will find SeoQuake useful for estimating effectiveness and competitive ability of their SEO efforts. In the hands of professional SeoQuake will become a powerful and indispensable tool for analyzing optimization and promotion level of internet web-projects. SeoQuake can be distinguished from similar projects by a wide range of parameters available for analysis, simplicity of use and also a tool for creation of custom parameters. SeoQuake consists of two functional parts. The first one is SeoBar. The second part is the computation of the parameters for search results and its inclusion into search engine result pages – SERPs – for the most popular search engines. SeoBar SeoBar can be described as an additional toolbar, which shows the values of selected parameters for the page currently opened in the browser window. Set of parameters shown by SeoBar is fully customizable by user.
Inclusion of parameters in SERPs After submission of the query into the search engine user is presented with SERP with search results. SeoQuake shows values of the parameters for search results under each search result shown on SERP. Set of parameters shown is fully customizable by user. Loading of parameters can be handled in two different ways – simultaneously with the loading of the SERP or after SERP loading, by user demand. Ranking of the results by selected parameter in ascending/descending order and storing results in file are available features. Parameters While having a wide range of default parameters, SeoQuake also gives users the opportunity to create their own parameters and also group them into presets and switch between these presets on the fly, during the work. General set of parameters consists of such parameters as Google PR (Google PageRank of current page), Google Index (Number of indexed pages. Google version), Google link (Number of links, pointed to the current page. Google version (Except links from concerned domain)), similar parameters for many other search engines (Yahoo, MNS, Yandex, Rambler, Baidu) and some other miscellaneous parameters.
There is also a tool for creation of custom parameters at user’s disposal. These parameters can be saved and used for future research, whatever it may be. All SeoQuake parameters can be turned on/off to be shown in SeoBar or on SERPs. Miscellaneous SeoQuake submits a query to search engine every time when it needs to obtain a value for a new parameter (that is not in a cache yet), defined by this search engine. Frequent use of big amount of the parameters may lead to the ban of user’s IP address from search engine. In this case, you will need to delete cookies or change proxy server. Full description of all SeoQuake functions and parameters can be found on official site of addon: http://www.seoquake.com/index-en.php Warning! Extension is using the advertisement block in results of search engines. Please, read Privacy Policy, before install http://www.seoquake.com/policy.html
Support : Mozilla Firefox 2.0 until 3.0