Ad Integration: Tips and templates for making residual income online by displaying advertisements on your own site.
Adsense Forums: Forum for web publishers participating in the Google AdSense advertising program to discuss methods of maximizing their earnings.
Compare Your Clicks: Resource allowing Webmasters to run live comparisons of keyword bid prices at multiple pay-per-click search engines.
JenSense: Provides tips, news, and information on AdSense and other contextual advertising programs available from PPC service providers. Free syndication by XML/RDF.
Pay Per Click Analyst: Reviews of pay per click search engines.
Pay Per Click Guide: Reviews the best and worst pay per click search engines on the Web. Includes web promotion tips.
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.
Pay Per Click Search Engines Reviewed: Aims to review all sites that charge money for listing or ranking a site.
Pay Per Click Wire.com: Free pay per click search engine reviews, news and helpful advice.
PPC-Directory.com: Listing of hundreds of pay per click search engines, reviews of bid management tools, scripts, and sites.
Self SEO: News, articles and tools for PPC advertising.
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.