This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
Prismatic Basic Pattern 2 No Background
Source GDJ
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Sharp pixel pattern, just like the good old days.
Source Paridhi
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
A comeback for you: the popular Escheresque, now in black.
Source Patten
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
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
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert