Keyword Marketing Buddy is a tool that lets you compare the popularity of a number of keywords at one time. You enter in a list of keywords, and the Buddy will automatically suggest a number of related keywords, and will rank by popularity. The keyword output also includes a text box with a comma-separated list of keywords and popularity values so that you can easily import the list into a spreadsheet or use other keyword analyzer tools.
Keyword Market Value Analyzer is a tool that allows you to compile a database of keywords, based on a particular keyword subject, and compare their real market values. The analyzer compares the number of times a keyword is searched for with the amount advertisers are willing to pay to advertise for the keyword. The result is a really good idea about how much money-making potential there is for that particular keyword.