SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Screaming Frog SEO Spider - The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links...
SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.
Pulno - SEO Audit and Website Analysis. Pull up your SEO.
SEOmator - SEO website analysis & audit tool