SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Linkody - Save time and money by managing your SEO linkbuilding with Linkody.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Backlinks by Neil Patel - A backlinks research tool for competitive intelligence
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.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters