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.
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.
Shortlist Metrics - A simple tool to help you scale your link building faster
Q-Stats - Get free marketing insights for every question on Quora.
Curatedseotools.com - Curated directory of the best SEO tools.