Search Engine Directory

Pay Per Click (PPC) Engines

Google Update History

Microsoft adCenter Labs

Search Engine Watch

Search Engine Watch offers research and analysis on current search engines including search engine submission tips, web searching tips and search engine reviews.  

Ad Resource

Ad Resource is an excellent beginner's guide to online advertising including a useful industry glossary, pricing calculators and interesting articles.

Whois Search

Google Adwords Content Network

Search Engine Ranking

Advanced Web Ranking is a search engine ranking software that emulates a manual search through each search engine, tracks the position of your website in the search engines and shows where your competition is ranked compared to your site.

Search Engine Optimization Resources