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!
Virusdie - All-in-One cloud-based, simple, powerful and gorgeous website security tools built for everyone.
Smaller - Make your websites load faster
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Wordfence - Comprehensive security plugin for WordPress.