Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
Prismatic Basic Pattern 2 No Background
Source GDJ
Black And White Floral Pattern Background from PDP.
Source GDJ
Seamless Olive Green Web Background Image
Source V. Hartikainen
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Here I have tried to create something that would look like maple wood. Not sure how well it's turned out, but at least it looks like wood.
Source V. Hartikainen
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Feel free to download and use it, or see the rest of the dark background patterns that I have made. Anyway, I hope you will find something that you like.
Source V. Hartikainen
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
The original enhanced with some gradients.
Source Firkin
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen