Sitebeam - Spelling mistakes, SEO, load speed, social media, code, W3C, accessibility & more in one tool.
Page Optimizer Pro - Page Optimizer Pro is an on-page SEO tool, allows marketers to produce flawlessly optimized pages for Google with ease.
Ryte - Ryte is a web-based software invented for technical optimization for search engines and improvement of websites.
Schema App - Schema App empowers the Digital Marketer to own their schema markup strategy through to implementation without ever writing code.
RankScience - Advanced Content Optimization Software for SEO
BacklinkSEO - BacklinkSEO is an SEO tool, which is designed to build and monitor backlinks with ease.