If you run a large (or small) site and maintain reciprocal links with other sites Link Trade Verifier will automate that task for you. This is a database driven application that will store all the URL's of the web sites that are linking to you and will scan them for the link back to your site. You can specify both the URL of the linking page as well as the keyword to search for. Watch the results in real time while the program is working as it only takes a few seconds to check a large number of sites.