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.
CKEditor - Real-time collaborative future-ready rich text editor
Playbuzz - The leading authoring & distribution platform for interactive stories. Use our suite of storytelling tools to create engaging editorial & commercial content.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
Zembula - Zembula enables marketers to create and embed interactive experiences that are optimized for conversion.
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
4screens - 4screens is an interactive content creation platform enabling marketers to create engaging interactive content and social experiences.