Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
The tile this is based on can be retrieved 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
Prismatic Abstract Geometric Background 4
Source GDJ
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
Prismatic Floral Background No Black
Source GDJ
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki