A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Here's a quite bright pink background pattern for use on websites. It doesn't look like a real fur, but it definitely resembles one.
Source V. Hartikainen
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Derived from an image that was uploaded to Pixabay by TheDigitalArtist
Source Firkin
A repeating background with wood/straw like texture.
Source V. Hartikainen
Prismatic Hypnotic Pattern No Background
Source GDJ
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers