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
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A seamlessly tile-able grunge background image.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
This one needs to be used in small areas; you can see it repeat.
Source Luca
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
Black brick wall pattern. Brick your site up!
Source Alex Parker
Kaleidoscope Prismatic Abstract No Background
Source GDJ
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Prismatic Floral Background No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen