Sitebeam - Spelling mistakes, SEO, load speed, social media, code, W3C, accessibility & more in one tool.
Opteo - Opteo searches for statistically significant patterns in an account and creates "optimization tasks" to improve account performance.
Ryte - Ryte is a web-based software invented for technical optimization for search engines and improvement of websites.
Maxymiser - The most powerful solution for optimizing the online customer experience with testing, insights and personalization.
RankScience - Advanced Content Optimization Software for SEO
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters