Appsero - Appsero is a killer WordPress Analytics, Licensing & Deployment Tool. Appsero is the perfect companion for WordPress plugin & theme developers.
SEO Analyzer By Neil Patel - A free SEO analyzer for your site
Serpstat Website SEO Checker - Check your website's SEO, analyze competitors and keywords
How Much To Rank - Google ranking cost calculator
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
Meta Tags - Meta Tags is a tool to debug and generate meta tag code for any website.