SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
SEOmator - SEO website analysis & audit tool
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.
Advanced Web Ranking - Advanced Web Ranking (AWR) is a robust rank tracker, specially designed for large amounts of keywords, which makes it the ideal solution for agencies and medium-to-large in-house teams.
Lumar - (Previously DeepCrawl) Hosted SEO spider to analyze and find problems with websites.