To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Retro Circles Background 7 No Black
Source GDJ
Prismatic Groovy Concentric Background No Black
Source GDJ
Prismatic Polka Dots 3 No Background
Source GDJ
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
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
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
Prismatic Groovy Concentric Background 3
Source GDJ
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett