Wed Dec 26 08:03:16 PST 2018

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Quantcast offers free demographic profiling tools.
Quantcast offers free demographic statistics for websites. They also show how
sticky a website is, which is important to consider when buying ads on a site or
competing in a new market.
Ontology Finder
http://www.gorank.com/seotools/ontology/
Ontology Finder from goRank finds related words using the Google similarity
search. Logically using related terms in your text may help boost your relevancy in
latent semantic indexing-type algorithms.
Lexical Database
WordNet is a lexical keyword database for the English language. I have not used it
yet, but if you are technical in nature it is probably pretty interesting and useful.
Digital Point?s Keyword Suggestion Tool

http://www.digitalpoint.com/tools/suggestion/

Digital Point created a free tool that combines the Yahoo! tool and the free version
of WordTracker: