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
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
Prismatic Hypnotic Pattern No Background
Source GDJ
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Colorful Floral Background 3 No Black
Source GDJ
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen