A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Sometimes you just need the simplest thing.
Source Fabricio
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
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
Abstract Tiled Background Extended 10
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This one is amazing, truly original. Go use it!
Source Viahorizon
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
White circles connecting on a light gray background.
Source Mark Collins
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo