CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
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
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
A gray background pattern with a texture of textile. Suits perfectly for web design.
Source V. Hartikainen
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
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
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless texture of worn out "cardboard".
Source V. Hartikainen