A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Almost like little fish shells, or dragon skin.
Source Graphiste
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Prismatic Hexagonalist Pattern No Background
Source GDJ
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Seamless Green Tile Background
Source V. Hartikainen
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
Retro Circles Background 7 No Black
Source GDJ
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers