Splash
 
About
Splash is a little toy that lets you splash around a bunch of particles using the sudden motion sensor. Requires OSX 10.4.x running on either PPC or Intel Mac.
Version 1.5: Rebuilt with latest SMSLib. Should now work with curent model MacBooks.
Version 1.4: Can now turn it all the way upside down.
Version 1.3: Replaced my own SMS code with Daniel Griscom’s SMSLib.
Version 1.5 Cost Free License GPL Download
 
Source