I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
This is sort of fresh, but still feels a bit old school.
Source Martuchox
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
Background formed from the original with an emboss effect
Source GDJ
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
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