I don’t recommend software very often except this recent service is superb. It’s a key phrase tool which has a database of millions of key phrases showing the adwords traffic count monthly along with the google competition count and other data.

At a click of a button you’ll find phrases with traffic but no competition and I’ve used it already to get pages and web-sites to the top of the search engines, even with no backlinks.

You can look at a video of it in use