Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
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
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
Prismatic Groovy Concentric Background 2
Source GDJ
An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin