The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
The image depicts a seamless pattern of Japanese Edo pattern called "kikkou-matsu" or "亀甲松" meaning " tortoiseshell-pinetree".The real pinetree is like this: https://jp.pinterest.com/pin/500744052301065077/
Source Yamachem
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
A free seamless background with pink spots.
Source V. Hartikainen
A bit strange this one, but nice at the same time.
Source Diogo Silva
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
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
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin