WordPress Authority Checker plugin: This plugin will allow you to add authority checker tools directly to your website with no limit of usage.

The WP Link Builder plugin detects and promotes your backlinks: "This is like SEO on autopilot". Compatible with all other popular SEO plugins and backlink plugins and tools like: Yoast SEO, All in One SEO Pack, Broken link checker, SEO Friendly Images, SEO Ultimate, The SEO Framework, SEO Redirection Plugin, SEO Post Content Links, Broken Link Checker, etc.

wpSEOkit SEO plugin helps you to improve your off-page SEO factors, especially your backlink profile.