Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
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
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Just like the black maze, only in light gray. Duh.
Source Peax
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