Which is the best keyword tracker tool?

There are many. I personally develop and sell A1 Keyword Research (with which you can add your own search engines to it.) Buy try search the net, you will lots of tools for keyword research. Ultimately it comes down to your needs and preference. Many people use multiple tools since most solutions have their own advantages/disadvantages.

I preferred only Google keyword tool and Wordtracker.I had never tried any other tool except these both.

For keyword suggestions those two sources are also the most widely known and used, no doubt about that! However, tracking keyword search positions, competition, combining keyword lists into new ones for PPC etc. keyword research tools can still help

http://www.keyworddiscovery.com/ is another source. But for keyword suggestions, I tend to base most on Google Adwords myself (there I am spending most money anyways, so makes good sense to use data from there)

Hey....
If we say the best tool for keyword search than i will chose Wordtracker
It just awesome.. than my second choice would be keyword Spy
both are quite good and user friendly.....

There are really lots of keyword tool in the net that you can use to determine the perfect keyword for your site. Try Google keyword tool.

Just my 2 pence: SEMRush.com

There are really lots of keyword tool in the net that you can use to determine the perfect keyword for your site. Try Google keyword tool.

Look at the recent article:
7 Free Keyword Tools for Thousands of Keyword Suggestions

I generally prefer Google Keyword tool but I also like SEM Rush for this. It is also a nice tool.

there are some good tools out there: if you have some money to invest:seomoz and market samurai, Siteopsys, free edition of Rank Tracker, but I would have to say Google AdWords is what I personally prefer.

There are lost of keyword tracker and research tool in this large web space. But I always use Google adword keyword tool for my web page keyword. And I suggest to all of you that use this tool.

Google adwords is the best as having good experience with it....else you can also go for mike's search engine.....

As I know and used,Google adwords is best keyword tracker tool.

Why don't you go for Google analytics?
They will provide you the entire report of your site to be tracked with respect to your keywords. It also tracks traffic to your site location-wise.

For me the best keyword tracker is the Market Samurai. This is a great word tracking tool.

One thing you want to avoid is paying a monthly fee for a tool. Invest in some good software once, and enjoy great keyword tracking for the rest of your internet marketing career.

You should try rockinseo.com, it's a free keyword tracker that:

- supports Google, Yahoo, Live
- tracks multiple domains

I preferred only Google keyword tool and Wordtracker.I had never tried any other tool except these both.

Google Adwords is best tool.

Google Adword is one of the best option among them. There are so many options but this one is truly one of favorite of mine.