Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
A seamless web texture of "green stone".
Source V. Hartikainen
Sharp pixel pattern, just like the good old days.
Source Paridhi
A version without colours blended together to give a different look.
Source Firkin
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
A blue background wallpaper for websites. It has a seamless texture with vertical stripes. It looks quite nice not only when using as a tiled background on websites, but also on computer desktops.
Source V. Hartikainen
This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.
Source Yamachem
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Prismatic Hexagonalist Pattern No Background
Source GDJ
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
This is the remix of "Colorful Floral Pattern Background 3" uploaded by "GDJ". Thanks.
Source Yamachem
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Sharp but soft triangles in light shades of gray.
Source Pixeden
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin