I have also used only Google adword tool and really this is one of the best resource.My experience is regarding this ,very good.
A keyword tracker is a tool which shows your sites position in context to a given keyword in a particular search engine.
Google keyword tool provides an almost exact data of the volume of people searching for a certain keyword as well as popularity. Two thumbs up for this tool.
Hi dear, For keyword tracking I use adword tool, as it seems to be best for me. Instead there are many more on internet, you can use according to yours. Thanks.