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!
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
Dragon Metrics - Dragon Metrics is an SEO platform offering rank tracking, onsite optimization, link management, keyword research tools, & more
EasyRedir - URL redirect service for business, marketing and SEO.