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Yahoo Backlinks Checker
Firefox add-on that allows you to verify Yahoo backlinks....
Niche Watch Tool
A Firefox add-on that provides you technical information in order to beat your competitor websites in serps...
backlink technical data back link number keyword occurence technical
SEO Fuze
A Google Code add-on that offers you complete SEO analyzes including info about the Google and Alexa Rank PR and much more...
Alexa Site Stats
A Safari extension that displays the Alexa traffic stats for the current page...
Backlinks Extractor 1.1
Quickly extract backlinks from any URL...