A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin