I find this tool very useful in my previous project. If you are the SEOptimizer in your company, I think you'll gonna like Market Samurai. Here are some of the features of this tool.
Receive Accurate, Up-To-Date Data on Keyword Traffic, Target Profitable Markets with Pin-Point Accuracy, Uncover Previously-Undiscovered Niche Marketing Goldmines, Perform In-Depth Analysis on Markets and Niches, Discover the Specific Keywords Used by Your Customers, Avoid the Time-Consuming "Grunt-Work" of Market Research, Avoid Tyre-Kickers by Laser-Targeting "Buy" Keywords And Much, Much More.
You can donwload their trial version here.