From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Background formed from the original with an emboss effect.
Source Firkin
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Prismatic Groovy Concentric Background 2
Source GDJ
A white version of the very popular linen pattern.
Source Ant Ekşiler
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
An alternative colour scheme to the original seamless pattern.
Source Firkin
Colour version of the original seamless pattern.
Source Firkin
A pale olive green background with a seamless texture.
Source V. Hartikainen
Clover with background for St. Patrick's Day. Add to a card with a doily, ribbon, a leprechaun or other embellishments.
Source BAJ
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
The original enhanced with one of Inkscapes's filters.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
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
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen