Since overture closed, where are these "keyword tools" getting data from?

I'm trying to find a keyword tool since overture closed. I see lots of supposed keyword trackers but I'm pretty skeptical considering the fact they don't own a search engine to pull legit and accurate results from.

Plus all the inconsistencies on the different trackers, I have a feeling these trackers are no more accurate than the ridiculous PR prediction tools.

Thoughts?

 

Free or paid tools? I know of at least one piece of software (Adword Analyzer) that switched from Overture to Wordtracker results, but I haven't paid attention to other ones lately.

 

Yes, I also think that the keyword tools in the recent times that have cropped up are not accurate.
you can search https://adwords.google.com/select/KeywordToolExternal

I think this google's keyword tool is good.

 

since the overture closed i am also using adwords.google.com.

 

I also think that the keyword tools in the recent times that have cropped up are not accurate.

 

There are not that many tools with their own unique keyword databases, so would be good to know which ones you are referring to?

Cheers
David