A seamless pale yellow paper background with a pattern of animal tracks.
Source V. Hartikainen
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH
A classic dark tile for a bit of vintage darkness.
Source Listvetra
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
A seamless background of warped stripes on paper.
Source V. Hartikainen
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
The original enhanced with one of Inkscapes's filters.
Source Firkin
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
A seamless pattern formed from background pattern 102
Source Firkin
A cute x, if you need that sort of thing.
Source Juan Scrocchi