Just was told that back links mean everything for Google. Searched a few minutes and found interesting links that help you identify the answer to that question and many others. Here are the links:
Top 10 Must Have SEO Extensions for Google Chrome – SEO Tools – Moz 
World’s Best SEO Tools and Free Search Software | Moz
Free Link Building Tools from BuzzStream 
Backlink Tutorial: How to Get 50+ Quality Backlinks Every Month 
Ahrefs: Competitor Research Tools & SEO Backlink Checker
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