Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
This is a hot one. Small, sharp and unique.
Source GraphicsWall
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
A repeating background with wood/straw like texture.
Source V. Hartikainen
Prismatic Abstract Geometric Background 4
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
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
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. A version of the original with random colors.
Source Firkin
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick