The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ