Where can I find some good keyword analysis tools?

@WinkyB (43)
United States
September 11, 2006 9:39am CST
I do a lot of pay-per-click advertising online. There are a few keyword analysis tools that I use and like. I'm wondering if anyone has some other recommendations for good keyword analysis tools. Thanks!
1 response
@randyw (216)
• Russell, Kansas
6 Feb 07
Try http://inventory.overture.com This is an oldie but a goodie that's updated monthly and provides very good lists of keyword variations.