Recently I've spent a little time getting the Ogre3D engine into a state where it'll work on the Nokia N9 and N950 MeeGo phones.
To test the port out a bit more extensively I decided it'd be a good idea to try porting an existing FOSS game, Those Funny Funguloids. So after a fair amount of hacking to make it compatible with my version of Ogre and to make the controls work reasonably on a touch screen device I have a playable version.
The aim of the game is to collect mushrooms (...IN SPACE), and bring them back to your base without running into any asteroids. Only mushrooms of the same colour as your base are added to your score and your base changes colour each level (but you can hang on to mushrooms between levels and score them later). The controls are fairly simple, touch the left side of the screen to turn left, the right side to turn right and the middle to start moving.