From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
Prismatic Basic Pattern 2 No Background
Source GDJ
From an image on opengameart.org shared by rubberduck.
Source Firkin
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Remixed from an image that was uploaded to Pixabay by CatherineClennan
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
There are many carbon patterns, but this one is tiny.
Source Designova
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A white version of the very popular linen pattern.
Source Ant Ekşiler
Kaleidoscope Prismatic Abstract No Background
Source GDJ
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman