Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
A white version of the very popular linen pattern.
Source Ant Ekşiler
The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A browner version of the original weathered fence texture.
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A free seamless background with pink spots.
Source V. Hartikainen
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin