For site and blog owners out there, there's a Free Keyword Suggestion Tool from Wordtracker.com which you can choose for a variety of purposes like choosing a niche for your web site, or choosing a blog or article topic to improve your site traffic.

Also, if you're using Internet Explorer 7 of Firefox 2, you can add a Wordtracker keywords search to your browser with a single click. You can find the link on the same page as the suggestion tool.

Another Wordtracker freebie is their Current Top 30 Keywords list. On the same page, you can also subscribe to a weekly free Top Keywords report which will give you the top 500 frequently searched words on the Internet.