The following site has a free backlink booster. This site requires you to put a HTML code on your site. What i did was just create a random blogger.com blog and put the code on that. The site has a free backlink booster that allows you to search your keywords for follow blogs. It lets you search by PR and by domain. After you search, you click the results, add your comment and keep moving down the list. I ran into trouble finding results if I searched for specific keywords. Site is hxxp://www.htmllink.net hxxp would be http It's not a perfect site, but it helped me a lot.