Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Derived from a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
This seamless web background texture looks like gray stone. It's great for using as a background image on web pages, or on some of their elements. Anyway, I hope you will find use for it.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Colour version of the original pattern.
Source Firkin
Gold Triangular Seamless Pattern No Background
Source GDJ
Fix side and a seamless pattern formed from circles.
Source SliverKnight
Might not be super subtle, but quite original in its form.
Source Alex Smith
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Prismatic Floral Background No Black
Source GDJ
Classic vertical lines, in all its subtlety.
Source Cody L
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian