A seamless texture of worn out "cardboard".
Source V. Hartikainen
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
An orange vertically striped background pattern. Feel free to download and use this orange background pattern, for example, on the web). It resembles a wallpaper with vertical stripes or something similar to it.
Source V. Hartikainen
Black & white version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
f you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Colorful Floral Background 3 No Black
Source GDJ
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen