Yahoo Answers is another free source for research. Used correctly you can determine a pattern as to what it is that people are wanting to know which is perfect for an idea for your next niche product.

You can also become an authority on a subject matter by addressing those questions with intelligent answers.

With categories from Computers to Hobbies this research should not be overlooked.

Access Yahoo Answers here 

Here is a free Google Keyword Suggestion Tool. The beauty of this tool is you can even narrow down the Country you wish to search for a particular keyword.

The results include the over bid price, monthly search volume on Google, Yahoo, MSN together with other results.

Well worth adding to your arsenal of Research Tools.

Free Keyword Suggestion Tool Here