3D Ghosts in the Graveyard

The classical-music soundtrack imparts the right degree of Gothic ambience, but you can add your own MP3s if you know of a scarier tune. If you want to add more action to the scene, 3D Ghosts in the Graveyard lets you add any number of skeletons, bones, candles, and bats, which will float across your screen at random intervals. You also can adjust the scene's brightness and tint, which allows you to view the otherworldly spectacle in broad daylight or under cover of darkness.
Version 4 has new color presets and time of day settings, an about box and improved user interface.