From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Prismatic Groovy Concentric Background 2
Source GDJ
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Abstract Background Design No Black
Source GDJ
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen