SISTRIX - SISTRIX toolbox is an SEO tool for professionals helping reputable companies to constantly improve their websites.
Synthesio - Synthesio is a social intelligence tool or a marketing software that is specially made for the purpose of social media monitoring and social analytics.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Swift Social - All-in-One Social Media Growth and Management Tool
Page Weight - Find and fix heavy images on your website
Opteo - Opteo searches for statistically significant patterns in an account and creates "optimization tasks" to improve account performance.