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CKEditor - Real-time collaborative future-ready rich text editor
Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
TinyMCE - TinyMCE is a content editor that functions as a plug-in for Wordpress websites.
doopoll - Create live, instant, editable polls effortlessly
Quill - Powerful, API-driven rich text editor