To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
A seamless pattern formed from a tile made from ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem
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
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Here's a quite bright pink background pattern for use on websites. It doesn't look like a real fur, but it definitely resembles one.
Source V. Hartikainen
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
From an image on opengameart.org shared by rubberduck.
Source Firkin
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen