I'm familiar with Traffic Travis and Google Keyword tools, but I was wondering if there are any other good free programs that can help you research keywords for on-site optimization?
Try a free trial to market sumurai, I used it and it gives you so much more info, like buying keywords
Lots of keywords tool are in world wide web but they are paid ...if you want paid version keyword tool then best is https://www.wordtracker.com/trial/
mate just thinks, you dont need a tool at all. thinks what would my client - visitor would have to search to get to my website .. is it a website about kawasaki motorcycles in canada would my visitor need to search - elians on earth or will it search for kawasaki motorcycles in canda .. its pretty simple.
You can use this free tool from our site http://keywords.submitexpress.com/ It will find some similar keywords, but then you can use this to estimate traffic : http://keywords.submitexpress.com/keytracker.php We have partnership with www.Wordtracker.com and www.keyworddiscovery.com (Trellian) which are 2 of the best fee based keyword tool providers and pull data from them and show it to you side-by-side. You can also use www.keywordspy.com and www.spyfoo.com to find out what keywords your competitors use. You can also sign up for Yahoo and Bing Advertising and use their tools.
Free version of wordtracker tool is also good for keyword research, you use google suggestion for that.