A seamless background texture of old cardboard.
Source V. Hartikainen
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Oh yes, it happened! A pattern in full color.
Source Atle Mo
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Prismatic Abstract Geometric Background 4
Source GDJ