Asodesk - One solution to grow your app business
Seolyzer - Seolyzer is the ultimate SEO tool that provides you with all the information you need to improve your website’s health and performance.
Where is My Website - Highlight your site in Google and keep eye on Competitors
SEOmator - SEO website analysis & audit tool
OnCrawl SEO Chrome extension - Quickly but deeply audit your onsite SEO performances.
Whatsmyserp - Powerful Rank & Serp Tracking. Completely Free.