From a drawing in 'Kingsdene', Maria Fetherstonehaugh, 1878.
Source Firkin
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Retro Circles Background 7 No Black
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
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
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
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
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova