Site Rank Data - View historical rank information of websites via time series charts.
Postaga - Generate more backlinks and social shares with effective, automated post promotion and outreach.
Q-Stats - Get free marketing insights for every question on Quora.
Shortlist Metrics - A simple tool to help you scale your link building faster
Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more
Curatedseotools.com - Curated directory of the best SEO tools.