A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
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
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Continuing the geometric trend, here is one more.
Source Mike Warner
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso