According to Wikipedia: PageRank is a link analysis algorithm, named after Larry Page and used by the Google Internet search engine, that assigns a numerical weighting to each element of a hyper linked set of documents, such as the World Wide Web, with the purpose of “measuring” its relative importance within the set.
If you are a webmaster you may aware about the value of google page rank. It is used as one of the best method for finding authority of a website. Google updates Google page rank 2 or 3 times a year. Along with Google Toolbar some other independent website are also helps to find page rank of websites.
Any way I created an online resource for checking page rank. You can Check Page Rank of website using the form given below.
Google PageRank Checker
Enter any link of web pages or websites and click Check Google PR to check Google page rank of given link. Using this page rank checker you can easily find page rank of any links within your website. Which will help you to building back links. Page Rank of Individual web pages sometimes helps you to increase page rank of entire website.
Along with this tool I would like to mention about some other resources for checking page rank of Websites.
Google Page Rank Checker for Entire Website
PaRaMeter is free Google PageRank checking and monitoring tool. With PaRaMeter, you can easily check the page rank of multiple pages with one click. Download PaRaMeter