Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
A repeating background of beige (or is it more vanilla yellow) textured stripes. One more background with stripes.
Source V. Hartikainen
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
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
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Prismatic Hexagonalism Pattern No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Looks like an old rug or a computer chip.
Source Patutin Sergey
Abstract Tiled Background Extended 11
Source GDJ