This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5
Source GDJ
Prismatic Groovy Concentric Background 2
Source GDJ
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
A free background tile with a pattern of pink bump dots. This background tile is sweet! Moreover, it's designed for use as website backgrounds.
Source V. Hartikainen
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
The image a seamless pattern of a wire-mesh fence.I want you to use this pattern as a lower layer.
Source Yamachem
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady