This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
One more sharp little tile for you. Subtle circles this time.
Source Blunia
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
A free pink background pattern.
Source V. Hartikainen
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A seamless canvas texture for using as background on websites. Colored in pale tones of brown.
Source V. Hartikainen