A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
This one is amazing, truly original. Go use it!
Source Viahorizon
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
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Prismatic Abstract Background Design
Source GDJ
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin