Great resource for comparing your backlinks and SEO scores to competitors. This tool lets you explore backlinks using filters such as site authority, the date discovered, follow vs. nofollow, etc. They give you a good amount of data for free, but you can pay to access all data. I actually use ahrefs over Moz's Open Site Explorer since it's a little more visual and a bit simpler: http://www.producthunt.com/posts...