Useful Tools

Overture Keyword Selector Tool

This tool displays the number of times that a keyphrase was searched by Yahoo users during the previous month.  (Yahoo accounts for about one-fourth of all internet searches.)

http://inventory.overture.com

Keyword Density, Prominence, and Placement Analyzer

Type in your webpage's URL, and this tool will generate pages of useful data including how often words and phrases are used, the words found in anchor text, and the words found in headings:

http://ranks.nl

Keyword Density Tool

This tool is a no-frills Keyword Density tool that is easy for a novice to interpret:

http://tools.seobook.com/general/keyword-density/