I believe there are some fraction games at
http://www.mathwire.com/index.html. They may require fraction dice. Just type "fractions" or "fraction dice" in the search box at the top of the screen at this site.
Otherwise, I have used fraction dice to build a pizza. Make circles. Cut them into different fractional parts (1/2, 1/4, 1/8, 1/12 or 1/3, 1/6, 1/12), roll the dice, and build a pizza. The person who builds the whole pizza first is the winner.