A background pattern with a look of rough fabric.
Source V. Hartikainen
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Hexagonalist Pattern No Background
Source GDJ
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
A bit of scratched up grayness. Always good.
Source Dmitry
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin