I use these two: https://freekeywords.wordtracker.com/ https://adwords.google.com/select/KeywordToolExternal I think the Google Adwords tool is more relevant. What do you think? Which keyword tool do you use?
If you are running a WP blog, then I suggest Keyword Winner will be the best tool out there. But there are also useful paid keyword tools as well, and there's nothing wrong to try them all. Btw, dannbkk is right about Keyword Winner because it is very powerful and may change the way you do SEO today.
use the tool which is available in internet business promoter. in that you can use unlimited number of searches
Earlier i tried to use Market Samurai ...But the major problem is it takes lot of memory and loading time. But now couple of days back i brought Keyword Winner its simply amazing and user friendly ... Check out here - Keyword Winner
I use adwords keyword tool too i think it is more relevant but i think it is just have searches on google and not counting searches on other search engine(e.g. yahoo) but i think that tool is enough for keyword research
I've been using Market Samurai and it's good but I always refer back to Google's keyword external tool. I even bought a report on how to use Market Samurai more effectively and it started out with using Google's keyword tool!
I'm a google adwords user all the way, its the most relevant as thats the search engine I'm SEOing for!
Googles external keyword tool along with Market Samurai (check out the free trial, nothing to loose). Also used keyword sniper for a while, but quit.
Market Samurai - I think it is brilliant, gives you so much information and there are videos to train you.
I have tested at least 10 or 15 tools. Google and Wordtracker are definitely useful as a free option. However, in order to dig in and really understand a niche I wanted more. I ended up going with Market Samurai. Although it does run a bit slow at time, it has helped me go from a beginner to a successful online marketer. Good luck, whatever tool you use just remember to use it correctly!