[Guest]

These are the features of the "Snowflake" filter:

Full control over shape and size of the snowflakes.
Any number of snowflakes possible.
Configurable color.
Fully anti-aliassed.
Renders correctly on (partially) transparent images.
Reliable preview.
High precision calculations.
Complete help system available.
Save and load settings.
Supports any resolution.
Supports 8-bit RGB, grayscale and Duotone color modes.

As you can see, it's very flexible which makes it a useful plugin.