There are many online free seo tools. But for the desktop free seo tools, maybe there is no free lunch . lol
There are loads of free SEO tools available but most of them are blackhat so be careful while you are using them ..you may well end up getting banned from a search engine here is one you can use web site traffic site..this has some cool tools for SEo plus articles on how to use it!! read those before you use it!!
Hi, This is huge list of seo tools, enjoy.... www-marketing.blogspot.com/2008/08/136-seo-toolsgreat-seo-tools-for.html
I think you can download a free version of IBP ... well you used to be able to. I use the professional version for my SEO clients. It's a great program