Snowify

Get it on Gumroad (free)

Blender - Snowify (Procedural Snow Generator)

This Blender file contains the geometry node setup that adds snow to any object. Just add the geometry node setup to your object, weight paint where you want the snow to appear, and add that weight...

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Get it on Blender Market (paid)

Snowify

Snowify allows you to drag and drop snow onto ANY object or surface you'd like. It's completely customizable and works incredibly quickly.

blendermarket.com