Quizterra - Create, publish and monetize interactive content on your website. Quizterra is a functional quiz making software with great designs, wide functionality, and free embed.
CKEditor - Real-time collaborative future-ready rich text editor
Zembula - Zembula enables marketers to create and embed interactive experiences that are optimized for conversion.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
4screens - 4screens is an interactive content creation platform enabling marketers to create engaging interactive content and social experiences.
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.