If you have an interactive whiteboard in your classroom, try these PowerPoint games. Some are ready to go; some need you to type your own questions into the template.
The PowerPoint games I've developed here could be used in two ways. Either a zippy fun thing in the last few minutes of the lesson to test what you've studied in the lesson, or an activity which could lead to discussion of grammar/pron/vocab. The template for these games will allow you to make your own.
One word of warning: in my experience, interactive whiteboards don't always react well with some types of animation in PowerPoint. So, I would advise using the mouse to click on questions in PowerPoint rather than the whiteboard pen, unless you are extremely confident about your whiteboard technology.
Game 1: Odd one out / multiple-choice quiz
Game 2: Who wants to be a millionaire
Game 3: Treasure Hunt
Game 4: Anagrams
Game 5: Blockbusters (ABC)
Game 6: Top English
Game 7: Tornado
Make your own PowerPoint games
If you want to know how to make your own, have a look at these instruction videos