SeoQuake , a SEO Firefox extension aimed primarily to help webmasters on search engine optimization and internet promotion of web sites. SeoQuake allows to obtain and investigate many important SEO parameters and method of the internet.

SeoQuake add on will integrates into your web browser and modifies your search results, so that it contains useful SEO information as SEO result. Meanwhile, SeoQuake shows page ranks, incoming links, on all three major search engines, Alexa Rank, Technorati index, Web Archive Age, Digg index, links on del.icio.us and more.

SeoQuake consists of two functional parts. The first one is SeoBar. The second part is the computation of the parameters for search results and its inclusion into search engine result pages (SERPs) for the most popular search engines.

SeoBar shows the values of selected parameters for the page currently opened in the browser window. Set of parameters shown by SeoBar is fully customizable by user.

SeoQuake shows values of the parameters for search results under each search result shown on SERP. Set of parameters shown is fully customizable by user.

Number of Search Engine parameters on SeoQuake:

• Google PR - Google PageRank of current page
• Google Index - Number of indexed pages. Google version
• Google link - Number of links, pointed to the current page. Google version (Except links from concerned domain).
• Google cachedate - Date of current Google caches
• Yahoo Index - Number of indexed pages. Yahoo version
• Yahoo link - Number of links, pointed to the current page. Yahoo version (Except links from concerned domain)
• Yahoo Linkdomain (LD) - Number of links, pointed to the current domain. Linkdomain (LD) operator finds pages linking to domain, as opposed to link which finds references to a single page. Yahoo version.
• Yahoo Linkdomain2 (LD2) - Number of links, pointed to the current domain (2-level domain). Linkdomain2 (LD2) operator finds pages linking to an entire domain, as opposed to linkdomain (LD) which finds references to a current domain (subdomain for example). Yahoo version.
• Yahoo Directory - Domain presence in the Yahoo Directory.
• MSN Index - Number of indexed pages . MSN version.
• MSN link- Number of links, pointed to the current page. MSN version (Except links from concerned domain).
• MSN Linkdomain (LD) - Number of links, pointed to the current domain. Linkdomain (LD) operator finds pages linking to domain, as opposed to link which finds references to a single page. MSN version.
• MSN Linkdomain2 (LD2) - Number of links, pointed to the current domain (2-level domain). Linkdomain2 (LD2) operator finds pages linking to an entire domain, as opposed to linkdomain (LD) which finds references to a current domain (subdomain for example). MSN version.
• Yandex CY - Yandex Rank of current page.
• Yandex index (russian SE) - Number of indexed pages. Yandex version.
• Yandex link - Number of links, pointed to the current page. Yandex version.
• Yandex catalogue - Domain presence in the Yandex Directory.
• Rambler index (russian SE) - Number of indexed pages. Rambler version.
• Rambler top100 - Domain presence in the Rambler top100 catalogue.
• DMOZ Directory - Domain presence in the Dmoz Directory.
• Alexa Rank - Traffic estimation index
• WebArchive age - First date in Archive.org
• Del.icio.us index - Link to del.icio.us history for current url.
• Technorati index - Link to Technorati history for current url.
• Digg index - Link to Digg history for current url.
• IP lookup - Current domain IP.
• Whois link - Link to the Whois record of current domain.
• View source - Link to the source code of current web page.
• Check robots.txt - Check if robots.txt file exists and if it does show link to it.
• Page links - Dispaly quantity of internal/external links with the link to the link list.

SeoQuake is very useful firefox extension for webmaster to estimate the effectiveness and competitive ability of their SEO efforts.

Visit https://addons.mozilla.org/en-US/firefox/addon/3036 to download the latest version of SeoQuake.

Update : SEOQuake currently compatible for Internet Explorer browser. Plus more the addon of SEOQuake (IE) Version is compatible with Maxthon browser, Avant also.