@HanasonsJun 11.2013 — #Well, there are many tools for SEO but I don't use tools for off-page work, I use SEO processor plugin for on-page optimization purposes.
@kpkarthikJun 11.2013 — #Google adwords and Google trends are most powerful tool in SEO.Because it helps to find the related keywords for website and also full statistic about your related keywords.
@venumssiJun 13.2013 — #Keyword research tool is the most powerful than any other tools. Then analytic and webmaster tools. I highly recommend Google keyword research tools (instant search as well) and word tracker is the best tools.