SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
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!
SEOmator - SEO website analysis & audit tool
RankTrackr - A thoughtfully designed SEO rank tracker for teams that insist on accuracy, speed and simplicity.
SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.
Lumar - (Previously DeepCrawl) Hosted SEO spider to analyze and find problems with websites.