CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
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
Retro Circles Background 8 No Black
Source GDJ
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Colour version of the original pattern.
Source Firkin
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
The base gradient edited so now more details are rendered.
Source Lazur URH
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Original seamless pattern with an Inkscape filter.
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
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Number five from the same submitter, makes my job easy.
Source Dima Shiper