Best keyword research tool

[azguy]

Okay, what is the BEST keyword research tool?

I've heard all across the board, but I'm looking for preferrably a free tool, but just want to use one that can do competitive research, as well as find me a ton of long tail.

[Uramark]

I was not pleased with Spyfu.  Though their Recon reports look great, as they provide data on how much you profit is to be had by ranking higher on certain terms.

I am looking forward to using the SEOmoz reports and adding in Adgooroo's Tornado reports (which also supply missed profit) for clients.

[MotionPoint]

I have used all the tools mentioned above, but what I'm impressed is that AdGooroo is the only one that offers multi-market, mutli-search engine reports but their reporting suite is pretty basic.

[Bevelwise]

Wordtracker is also a tool that hasn't been mentioned yet.  It is paid, but looks at keywords a different way and usually includes ideas for me that I have not previously thought of or discovered using SEOmoz's tools or Google Adword's Keyword Tool.

[azguy]

Couldn't install it as it says it's not compatible with firefox 5.0

[azguy]

When you say SEOmoz tool, do you mean Competitive Link Research Tool?

[jegseo]

I also use the free KeywordSpy plugin

[Jinx14678]

Pretty much the same... I use SEOmoz tool, Keywordspy and Adwords

[AdoptionHelp]

The three I use are the SEOmoz tool, Spyfu, and the google adwords tool. I'm looking forward to see what everyone else uses!

Edit: To clarify I'm talking about the term extractor specifically, but all the keyword tools can help steer your keyword strategy.