Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
SEO PowerSuite - Get all SEO tools in one pack - download free edition of SEO PowerSuite and get top 10 rankings for your site on Google and other search engines!
SERPWatcher - SERPWatcher is a rank tracking tool built with focus on effectivity and ease of use. Stop wasting time with conventional rank trackers.
Nozzle - Nozzle is an enterprise level rank tracking tool. We pull over 400 data points from the SERPs so you can know everything that is happening for every search query that you care about.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters