Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Colorful Floral Background 3 No Black
Source GDJ
8 by 8 pixels, and just what the title says.
Source pixilated
Kaleidoscope Prismatic Abstract No Background
Source GDJ