Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
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
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
An alternative colour scheme to the original seamless pattern.
Source Firkin
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen