Linkopedia

Search Engines 201: "work that influenced all three of the above authors is also here: Eugene Garfield's 1955 (!!!) 'Citation Indexes for Science: A New Dimension in Documentation through Association of Ideas,' a must read if you want to understand the genesis of what we today call link analysis on the world wide web."

SEO tools. Research materials and hard core technical literature links to Search Engines and their algorithms and internal workings.