I have been using this free keyword search tool and recommending it to other webmasters for the last 9+ years.. its free and worth its weight in gold.
Its not a secret...you just need to register as a member to find out.
Keyword research is important for optimizing your websites.

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I am in contact with the developer at the moment to arrange for special pricing to members only and extended trials offers.
Their products are top rated in the seo business... hands down.

There is a sub forum dedicated to their products inside the members area.

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