SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
SerpWatch - Track your rankings with a fast and 100% accurate rank checker. Manage multiple locations and projects with full app integration. Try it for free for 15 days.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.
SEOmator - SEO website analysis & audit tool
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.