1.SEO for Chrome
SEO for Chrome provides you the SEO Stats and tools which will make your Daily seo tasks much easier than before. Using it you can check the Indexed Pages, Backlinks, traffic and Alexa & Page Ranks of your website easily.
It is a A simple tool to quickly check the position of a list of sites given a keyword. It will tell the ranking of the website based on the keywords.
3.SEO Site Tools
This SEO site tool will provide you On-Page / External metrics, Social Media info, PR / numbering on Yahoo, Bing, Google SERPs.
Use it to Check Alexa Rank, Page Rank and other metrics at a single place.
4.META SEO inspector
This extension is very useful to inspect the meta data found inside web pages, usually not visible while browsing. Using it I found that my blog is missing meta data which may affect my Blog's SEO. This will tell any problem with your page which you can improve.It also tell number of Do-follow & No-follow links.
5.Majestic SEO Backlink Analyzer
It provide information in form of Link Profile charts, Link counts at the URL. Using it you can find backlinks of your Blog. It also show Backlink history and referring domain chart.