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
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
Fix side and a seamless pattern formed from circles.
Source SliverKnight
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Here's a new gray "fabric" pattern. Use it as backgrounds for websites or for other purposes.
Source V. Hartikainen
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
The following free background pattern has glossy diagonal stripes as a texture to it, and it's colored in a light blue gray color. This background pattern is suitable for using in web design or any other graphic design projects. This applies to all background patterns here.
Source V. Hartikainen
Classic 45-degree pattern, light version.
Source Luke McDonald