Building backlinks to a site is an important strategy in improving the page rank and SERP of a site.There are different ways of building backlinks.One of them is leaving comments on do-follow blogs .In wordpress and blogger all comments are nofollow by default.This is done ostensibly to prevent comment spam.But some bloggers in order to make their readers comment more on their site they make the comments do follow.When  commented on those kind of blogs it leaves a permanent oneway backlink to your site.So here are some tools to find do follow blogs to leave comments and get backlinks.

commenthunt :A search engine which finds you do follow blogs

ezbusinessneeds :Another  search engine which finds you do follow blogs

fastblogfinder :A software to find do follow blogs

backlinkspot :One more search engine to find do follow blogs.

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