Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin