WordTracker, one of the web's leading keyword research tools, has released a free version of their keyword tool. It's available online and doesn't have any ads on it, or any limitations to the tool. (Other than a very reasonable 100 keyword per search limit).

Here's the URL: http://freekeywords.wordtracker.com/

I've been testing this little gem out today and I'll add it to my list of free keyword research tools by the time you read this. Make sure you add a bookmark to this tool.

This is certainly one of the best freebies out there for doing your keyword research. It's also worth reading up on what the 'score' each keyword is assigned actually means.

And if you want to get the bigger brother to this tool, then you can find out more about it here.

The full version of Wordtracker offers many more tools and searching capabilities way beyond 100 searches. There's a full review of it in the reviews section of this site.