I use for this seoquake plugin. It can be used in Firefox, Chrome and Opera browsers. SEOquake helps to obtain many parameters such as page rank, Google index, Alexa and many others, and also calculate keyword density. SeoQuake has a parameter that highlights noffolow links. seoquake can show values of the parameters under each search result in SERP of Google, Yahoo, Bing, Baidu. I think this tool is what you need.

Am using SEO Quake,
SEO Doctor
and SEO Status.
All of these are very good tools for SEO.

Scrapebox is a good all in one tool for most of these purposes.


Walter

SEO book is providing nice tool through that you can check Page Rank, link domains, back links, Alexa rank, competitioner for the web site. This plug-in will only compatible with Mozilla 5 higher versions.
SEO Quake also good, which will compatible with all most all versions of Mozilla. There are some new tools introduced by Google Chrome which are extremely easy for use.

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I use the seoquake plugin this is best for all of your requirement.

Best are Google tools, Google analytic for website traffic analysis and Google webmaster tool.. Also for rank checking and for page rank best tool is Firefox SEO Book toolbar. Also for competitor backlink checker backlinkwatch is best tool.

I personally believe that Google web master tool is the best option for entire website analysis and its proper tool for organic search engine campaign.

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Most of them use SEOquake plugin. It can be utilized in Firefox, Chrome and Opera browsers. SEOquake assists to obtain many parameters such as page rank, Google index, Alexa as well as many others, and also calculate keyword density. SeoQuake has a parameter that highlights nofollow links.