Smarter Scripts
- Offers scripts to help make websites more interactive. Offers Smart Search for building pay-per-click search engines, as well as other products for web promotion.
- http://www.smarterscripts.com

Self SEO
- News, articles and tools for PPC advertising.
- http://www.selfseo.com/

Adsense Forums
- Forum for web publishers participating in the Google AdSense advertising program to discuss methods of maximizing their earnings.
- http://www.adsenseforums.net

Pay Per Click Wire.com
- Free pay per click search engine reviews, news and helpful advice.
- http://www.ppcwire.com/

JenSense
- Provides tips, news, and information on AdSense and other contextual advertising programs available from PPC service providers. Free syndication by XML/RDF.
- http://www.jensense.com/

Pay Per Click Analyst
- Reviews of pay per click search engines.
- http://www.payperclickanalyst.com/

Pay Per Click Guru
- Compare pay per click search engines and other useful PPC tools. Browse information on various pay per click search engines, resources and tools.
- http://www.payperclickguru.com

Pay Per Click Guide
- Reviews the best and worst pay per click search engines on the Web. Includes web promotion tips.
- http://payperclickguide.com

Pay Per Click Search Engines Reviewed
- Aims to review all sites that charge money for listing or ranking a site.
- http://www.payperclicksearchengines.com/