From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Prismatic Groovy Concentric Background 2
Source GDJ
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Prismatic Chevrons Pattern 5 With Background
Source GDJ
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Sharp pixel pattern, just like the good old days.
Source Paridhi
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Geometric Pattern Background No Black
Source GDJ