xsnow

Follow the instruction to download and to install. You need to turn off desktop icon. Open gconf-editor, uncheck show_desktop under /apps/nautilus/preferences.


Snow plugin of Compiz Fusion

The Compiz Fusion from official repo does not have Snow plugin. So install compiz-fusion from non-official repo.

Before you can use this plugin, you need a snow image, download the snowflakes or mine. In CompizConfig Settings Manager, type snow to search for snow plugin. Enable it and add images under Textures tab. Press Super+F3 to enjoy!