Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Colourful background achieved with gradient fills.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight