Original minus the background
Source Firkin
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Remixed from a drawing in 'Incidents on a Journey through Nubia to Darfoor', F. Ensor, 1891.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A seamless texture of a rough concrete surface.
Source V. Hartikainen
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin