This add-on is compatible with Concrete 5.5.
See this add-on in action: http://c5extras.com/add-ons/snowflakes/
A really simple way to add an elegant animation to your website, with gentle falling snowflakes. But that's not all! You can select from 6 different animations: snowflakes, ash, butterflies, party circles, flares and rain.
If you only want a little snow, you can control the amount of snow appearing. Don't you wish you could control the real weather like that?