Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
It looks very nice I think.
Source V. Hartikainen
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
A version without colours blended together to give a different look.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ