Best sites for keyword research

Hi I put together a list of sites to help you with keyword research. I will be adding to this list as time permits.

http://www.keyworddiscovery.com/search.html
http://adlab.msn.com/ForecastV2/
http://www.keywordcountry.com/
http://www.wordze.com/
http://wordtracker.com/
http://www.keyworddiscovery.com/

http://spyfoo.com/

http://tools.seobook.com/keyword-tools/seobook/
http://freekeywords.wordtracker.com/
https://adwords.google.com/select/KeywordToolExternal

http://www.kwmap.net/
http://www.digitalpoint.com/tools/suggestion/
http://www.nichebot.com/
http://www.iotaweb.org/
http://seodigger.com/
http://www.keywordspy.com/

http://irotator.com/toppayingkeywords/?search=affiliate

Hope these tools help.