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
Make your own PowerPoint games
If you want to know how to make your own, have a look at these instructions videos