Searchmetrics Suite - SEO Software
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Clearscope - Data-driven content performance optimization platform
Website Checker Tech - WebsiteChecker.Tech is SaaS tool that detects SEO and availability issues of your website, making it easier for you to fix them.
Direction Local - Quickly Boost Your Local Search Rankings
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.