Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
A seamless background texture of old cardboard.
Source V. Hartikainen
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
This is a more minute version of "fishnet 01".The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Retro Circles Background 4 No Black
Source GDJ
Continuing the geometric trend, here is one more.
Source Mike Warner
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Prismatic Hexagonalism Pattern No Background
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight