Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Black brick wall pattern. Brick your site up!
Source Alex Parker
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Prismatic Curved Diamond Pattern No Background
Source GDJ
Prismatic Abstract Line Art Pattern Background
Source GDJ
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Zero CC tileable yellow craft paper; scanned and made by me. CC0
Source Sojan Janso
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
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
The original enhanced with one of Inkscapes's filters.
Source Firkin
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen