The SEO Tools here at BlackCodeSeo are free and are intended to be free. If you would like to request/offer a tool, please contact me at matt@blackcodeseo.com and I will be more than happy to oblige.

I am a firm believer in open source and hope to see more people get involved. I see no reason to charge for SEO research. As you already know, Whitehat SEO is mostly grunt work, so make the best of the tools. Keep on hacking!