myQuiz.org - myQuiz is an Audience Engagement Cloud Platform

PurpleTrail - Whether it is about birthday or wedding party or holidays, you just need to name the event and PurpleTrail will provide you the apt invitation solutions.

TestMOZ - TestMOZ is an online platform for creating interactive quizzes and questions to keep your audience engaged on your social media, websites, or blog channels.

Evite - Send online invitations for all occasions by email or text message. Create invites for birthdays, baby showers, save the dates, or customize your own design.

QuizWhizzer - QuizWhizzer is a platform that allows you to create a quiz to engage your audience inactivity.

Zoji - As claimed by the developers of this Zoji, it caters online tools to aid you plan activities off-line.