Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
Free SEO Checker by Spotibo - An SEO checker that analyses based on Google's algorithm 👀
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.
Ross SEO Extension - Ross SEO extension is a browser extension that instantly provides a deep analysis of a domain’s on-page website data to give complete insights into a website’s optimization data.
Curatedseotools.com - Curated directory of the best SEO tools.
Nightwatch - A forward-thinking SEO tracking and website performance tool.