With +A Rank Checker you will be able to search for the site rank for any number of websites. You will be able to check the PageRank, Compete rank, Alexa rank and link popularity from other websites. This is a great SEO tool, it's free to try.
Link validator tool written in PHP helps to check automatically if a page contain a link back to your site. Helpful in link exchange campaigns. Full Demo available at www.softbizscripts.com/automatic-link-checker-script-features.php
Amazing PHP Script to run link exchange campaign. Invite people to exchange? links right for your site and enjoy enhanced search engine positions. LIVE online demo at softbizscripts.com/link-exchange-script-features.php .
Link Buzz is a link popularity checker software which allows you to check for the no. of backlinks you have on six major search engines and databases and also the no. of pages you have indexed on the Google, Yahoo and MSN for any website you enter.