I use a chrome plugin called SEO Site Tools that I like. It's a very basic tool but gives you some quick insight into what you can improve SEO wise. If you are looking for something more in depth, I would consider an SEO company, or a few other tools. Depending on what you are trying to do, let me know and I can make some recommendations.
Hi, Please be specific whether you refer to SEO activities or tracking your SEO efforts. You may use Google Analytics tools to track your efforts. If you want deep analysis you may use Google webmaster central and link both Webmaster and Analytics tools.