Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved 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
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin