Just a simple question. and want to know about some free tools available.
For several years I use free versions of DigiXmas
software for link building, those can do excellent job for directory and article submissions.
On the other hand SEOQuake is one probably the best SEO add-on. A good strategy would be to check our topic related to advanced SEO operators and use Google to find backlinks for you. With simple form filler add-on for your browser you can quickly build links.
I am not quite sure, but I think that WebCEO
have free version.