SerpArchive is a service which daily stores the results of search engine queries indicated by user. Using this service users are able: to track the dynamic changes of the results of search engine queries to follow the rating changes of your resources and the resources of your business rivals in real time to analyse the changes in rating algorithm of search engines to track advertising programmes of Google Adsence to track down sites which appear/disappear from SERPs to analyse the PR

Simulate search engines. Shows Diagnostics, Source code view, and meta-tag view. Enter your URL to see what your site will look like in search-engine results. See how search-engine friendly your site is, can the spider crawl it easily? Will it get good rankings?

Find cloaking pages with this cloaking detector. This detector simulates the googlebot because some bad sites show google other content than the user.

This tool Simulates a Search Engine by displaying the contents of a webpage exactly how a Search Engine would see it. It also displays the hyperlinks that will be followed(crawled) by a Search Engine when it visits the particular webpage