Prismatic Hypnotic Pattern No Background
Source GDJ
The name is totally random, but hey, it sounds good.
Source Atle Mo
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Black brick wall pattern. Brick your site up!
Source Alex Parker
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Here's a new paper-like background for free use on personal and commercial projects (this applies to all background patterns here).
Source V. Hartikainen
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
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Sharp pixel pattern, just like the good old days.
Source Paridhi
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Abstract Ellipses Background Grayscale
Source GDJ
A version without colours blended together to give a different look.
Source Firkin
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin