Plerdy - Plerdy is a comprehensive conversation rate optimization software that caters to professional online marketers and agencies, allow them to enhance website performance and increase revenue greatly.
Ahrefs Backlink Checker - With the world's biggest index of live backlinks (over 15 trillion), Ahrefs Backlink Checker will show you the most complete backlink profile for any website.
Keyword Hero - Keyword Hero is an SEO tool for organic keywords.
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.
Ninjas Find Broken URLs - This tool will find broken links on your site and generate an XML formatted sitemap your site. You also have the option to export your data into a downloadable spreadsheet.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters