This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by TheDigitalArtist
Source Firkin
Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Might not be super subtle, but quite original in its form.
Source Alex Smith
Prismatic Polka Dots Mark II No Background
Source GDJ
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin