Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The base gradient edited so now more details are rendered.
Source Lazur URH
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
The name is totally random, but hey, it sounds good.
Source Atle Mo
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
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
White circles connecting on a light gray background.
Source Mark Collins
A seamless background of warped stripes on paper.
Source V. Hartikainen