Sample Game 

Okay, I admit working numerous math problems is typically not fun for most, but my students were literally begging for more!  www.Classtools.net is a really cool website that allows the user to customize templates that play like flash games.  There are numerous templates on the site, including arcade style (which is what I used), matching,  jigsaw puzzles, graphic organizers, etc.  To customize a game I only had to type in my questions and answers (I could have copied and pasted from another document), choose my game template, and save the .html file.  The games are free and extremely easy to make!