Sitebeam - Spelling mistakes, SEO, load speed, social media, code, W3C, accessibility & more in one tool.
Maxymiser - The most powerful solution for optimizing the online customer experience with testing, insights and personalization.
Ryte - Ryte is a web-based software invented for technical optimization for search engines and improvement of websites.
WooRank - Woorank is a Digital Marketing tool providing Instant Website Reviews & Personalized Tips for driving Traffic, Leads & Sales. Woorank covers: SEO, Mobile rendering, Social Media data, SERP ranking, backlinks, usability & servers optimization.
RankScience - Advanced Content Optimization Software for SEO
SISTRIX - SISTRIX toolbox is an SEO tool for professionals helping reputable companies to constantly improve their websites.