SeoBook - Free Keyboard Research Tool

Today I found a Free Keyword Research Tool It's called SEO Book Keyword Tool.
It offers rough suggested monthly search volumes by market for Google, Yahoo!, and MSN.
It also provides links to price estimate tools from Google AdWords. That Google AdWords tool shows the necessary bid to rank #1 for 85% of queries, and roughly how much traffic you could expect AdWords to send you based on that bid price and ad position.
And more...

If you don't want to pay a keyword tool like Wordtracker, then you can test this site, I did find some good keywords for my projects. I know it will work for you too.