Hot Potatoes

Hot Potatoes is an application for you to use it in any purpose and project you want.
When you download it,you are able to create multiple-choice,short answer questions,filling-gap exercises,matchings,and even crosswords.Besides,you can give feedbacks to your students after they are done with the quiz. 
We can say that Hot Potatoes is the father of Quizlet.You can realize the similarities easily.

KAHOOT

Kahoot is a game based classroom response system played by the whole class in real time.

It gives options to create quizes,surveys,and discussions.

Questions on the screen can be answered by the students via their smartphones,tablets,or computers.

Here is a view from Kahoot,and a sample quiz about linguistics prepared by me.
My quiz link