Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.

Curatedseotools.com - Curated directory of the best SEO tools.

Ubersuggest - Want more traffic? Ubersuggest shows you how to win the game of SEO. Just type in a domain or a keyword to get started.

Rank Math SEO - A FREE powerful and lightweight SEO plugin for WordPress

SEO Dub - AI-powered SEO audit and planning tool

Screpy - Screpy is a web analysis tool that can analyze all pages of your websites in one dashboard and monitor them with your team. It's powered by Lighthouse and it also includes some different analysis tools (SEO, SERP, W3C, Uptime, etc).