SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Pro Rank Tracker - Rank tracking & reporting software solution
SEOmator - SEO website analysis & audit tool
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
AccuRanker - AccuRanker is a cloud-based rank tracking tool.
SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.