Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
Prismatic Abstract Geometric Background 4
Source GDJ
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Here's a quite bright pink background pattern for use on websites. It doesn't look like a real fur, but it definitely resembles one.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber