Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
A nice and simple white rotated tile pattern.
Source Another One
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Continuing the geometric trend, here is one more.
Source Mike Warner
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
A free seamless texture of reptile skin colored in a dark brown color. As always, you may use it as a repeated background image in your web design works, or for any other purposes.
Source V. Hartikainen
Abstract Tiled Background Extended 11
Source GDJ
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen