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
Pro Rank Tracker - Rank tracking & reporting software solution
Optmyzr - Optmyzr AdWords Tools. Optimization Solutions, Quality Score Tracker, Landing Page Checker, and more. Free Trial Available.
Lumar - (Previously DeepCrawl) Hosted SEO spider to analyze and find problems with websites.