Free alternatives?

[MattM]

What are some free alternatives of keyword popularity searches besides Wordtracker?

[ozgression]

http://inventory.overture.com/d/searchinventory/suggestion/
________
juggalos (http://juggalos.org/)

[MattM]

Which search engine(s) do these results come from?

[chromate]

You don't need to pay to use Wordtracker effectively. Though it's nice to support them if you can afford it.