Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Abstract Geometric Background 4
Source GDJ
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Black brick wall pattern. Brick your site up!
Source Alex Parker
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
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
Prismatic Groovy Concentric Background 3
Source GDJ
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin