Subtle scratches on a light gray background.
Source Andrey Ovcharov
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
Seamless pattern inspired by a drawing on Pixabay. To get the tile this is formed from, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ