Appsero - Appsero is a killer WordPress Analytics, Licensing & Deployment Tool. Appsero is the perfect companion for WordPress plugin & theme developers.
Textalyzer - Analyze text readability and SEO parameters
SEO Analyzer By Neil Patel - A free SEO analyzer for your site
How Much To Rank - Google ranking cost calculator
Website Speed Ranker - Compare how fast your website loads vs your competitors
Meta Tags - Meta Tags is a tool to debug and generate meta tag code for any website.