I also think that the website Gimkit is another great resource that will allow teachers to share the knowledge that they want their students to know. It allows you to create a set of questions and answers that anyone with a Gimkit account can find your GimKit and share it with their class.
I too, use Kahoot. It seems to be a popular website to use for review and practice.
I like how the website offers more than just one style of game.
It works great for positive reinforcement. Also, it's a great tool to have in your back pocket for a day before break or first day back after a break.
Kahoot can be frustrating for students with reading challenges.