Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Prismatic Groovy Concentric Background 4
Source GDJ
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Prismatic Geometric Pattern Background No Black
Source GDJ
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
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