Updated: New version (this one runs :) - even for Mac Parallels folks). Sorry about that - improper manifest file with VC Express 2005 (or something); I'll have to look at exactly what the issue was later. The links in the post have also been corrected.
I was visting a friend last week, to see some of the VERY interesting new work he's doing, but, as an aside (nothing to do with any real project), he had just been playing around with OpenGL on his manly MacTel box. He wrote this fun little particle system thing that treated every pixel in an image as a particle... it was very fun, but only ran on the Mac.
So (being me) I did a version for Windows - no OpenGL, DirectX, or other (though those would help), of course, just code. Its not very optimal (its only 9kb compressed) - but kinda fun to play with. You can download it here. Click and drag in the image to see it work; press the 'o' key to load a new image.
Remember, its just a little app I compiled on my computer: there's been no QA, and it probably has a bug or two - other than that, its harmless :)