SEO Analyzer By Neil Patel - A free SEO analyzer for your site
Website Grader - Grade your website's strengths and weaknesses in seconds.
Serpstat Website SEO Checker - Check your website's SEO, analyze competitors and keywords
Smaller - Make your websites load faster
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
Textalyzer - Analyze text readability and SEO parameters