Thrive Quiz Builder is one of the best plugins for organizing quizzes, polls and polls on WordPress. And the most focused on the right marketing of them.
Demo: https://thrivethemes.com/quizbuilder/
WatuPRO is a multipurpose online quiz and exam software that can be used in education, research, contests, competitions, marketing or to increase user engagement on your site.
Demo: https://calendarscripts.info/watupro/
Universal educational App provides you with all the tools you need to easily create any theory (ebook) and quiz based application.
Demo: https://codecanyon.net/item/educational-app-theory-quizzes-admin-panel/28626612