Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
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
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
A free background pattern with abstract green tiles.
Source V. Hartikainen
Fix and cc0 to get the tile this is based on.
Source SliverKnight
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Might not be super subtle, but quite original in its form.
Source Alex Smith
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Prismatic Abstract Background Design
Source GDJ
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen