From an image on opengameart.org shared by rubberduck.
Source Firkin
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
A seamless pattern formed from a rectangular tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A brown metallic grid pattern layered on top of a dark fabric texture. It should look great when using as a tiled background on web pages, especially blogs.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Colorful Floral Background 3 No Black
Source GDJ
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Classic vertical lines, in all its subtlety.
Source Cody L
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
Prismatic Polka Dots Mark II No Background
Source GDJ
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
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
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A white version of the very popular linen pattern.
Source Ant Ekşiler
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Prismatic Floral Background No Black
Source GDJ
The image a seamless pattern of a wire-mesh fence.I want you to use this pattern as a lower layer.
Source Yamachem
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin