OnAir SEO Tools is a bundled collection of best seo tools website. We offer all for free of charge, Such as XML Sitemap Generator, Plagiarism Checker, Article Rewriter & more.
Not Applicable 
$ 8.95
ForaStat is a free tool which helps analyse websites and estimate valuation including such as Search Engine Reports, Traffic Reports, Social Engagement, Safety, Host Information, Domain WHOIS, Page Speed and much more.