Ahrefs Backlink Checker - With the world's biggest index of live backlinks (over 15 trillion), Ahrefs Backlink Checker will show you the most complete backlink profile for any website.
Free SEO Checker by Spotibo - An SEO checker that analyses based on Google's algorithm 👀
Whatsmyserp - Powerful Rank & Serp Tracking. Completely Free.
SEO Analyzer By Neil Patel - A free SEO analyzer for your site
Backlink Tool - A backlink tool to index your links quickly and freely.
SEO Minion - Chrome extension & Firefox add-on to help you with SEO