Quizizz
Quizizz is leaderboard-based quizzing app that allows real-time individual quizzing among students using their own devices. You can create a quiz and ask students to join by going to join.quizizz.com and entering your unique 6 digit code (which is generated every time you play a game). Then students work at their own pace to answer the quiz questions. Students's names are shown on the screen next to a progress bar which moves forward as they progress through the quiz. Many pre-made and adaptable quizzes made by other instructors around the world are available on the site.