Screaming Frog - Screaming Frog is search engine marketing agency offering search engine optimisation and pay-per-click advertising services.
SEO Site Checkup - Find comprehensive search engine optimization (SEO) tools for your site.
Ahrefs - Ahrefs is a toolset for SEO and marketing. We have tools for backlink research, organic traffic research, keyword research, content marketing & more. Give Ahrefs a try!
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Sitechecker - All-in-one SEO platform including rank tracker, website SEO audit tool and website changes monitoring. Detailed reports by 100+ parameters with how-to-fix guides.