Quizterra is a simple & functional, absolutely free quiz-making platform. The unique feature is that you can insert your custom ads before the quiz results and give your articles additional monetization.
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Playbuzz - The leading authoring & distribution platform for interactive stories. Use our suite of storytelling tools to create engaging editorial & commercial content.
Site Rank Data - View historical rank information of websites via time series charts.
Zembula - Zembula enables marketers to create and embed interactive experiences that are optimized for conversion.
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
4screens - 4screens is an interactive content creation platform enabling marketers to create engaging interactive content and social experiences.