(There's no video for Snow Surface yet. Please contribute to MR and add a video now!)
Snow Surface is a snow falling simulator demo made in 2000-2001. Snow Surface is a BETA so it's very simplistic, but you can still draw shapes with your mouse and those will retain snow for accumulation. The bottom of the window will also accumulate snow particles. Unfortunately, moving your window outside of the visible screen portion resets the snow particles. There is no known final version of Snow Surface.
Snow_Surface.sit (264.1 KiB / 270.44 KB)
Snow Surface (2000) beta/demo / compressed w/ Stuffit
System 7 - Mac OS 9.2.2
At least 2MB of free RAM, but enlarging the window to 1024x768 will require up to 6MB of free RAM
Emulating this? It should run fine under: SheepShaver