Snowfall

Simple easy-to-use and easy-to-set-up lightweight plugin for snowfall effect on your site. If you have any questions or inqueries, please feel free to get in touch via email kupnoh25@gmail.com.

Snowfall plugin uses snowfall library to set up snow effect. For more info about the library go to https://github.com/KupnoH/snowfall.
Plugin is very easy to install and use.
Though some coding needed to set this plugin up it’s very easy and Installation section explains it in details.
You can find this plugin on github here