This free interactive game website gets everyone involved. It is easy to use and allows the final results to be downloaded. Choose from public Kahoots or create your own. 

Wizer is an online interactive worksheet creator, but this app can be used for worksheets, quizzes, test, review, etc. It is free and simple to use. It allows video, audio, images, animated GIFs, and a variety of question types to be incorporated.

Create beautiful presentations with this app.
 

Everything you could possibly want to know about green screens from how to set one up to project and lesson ideas.