Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Abstract Background Design
Source GDJ
Prismatic Abstract Geometric Background 4
Source GDJ
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
Prismatic Floral Background No Black
Source GDJ
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Prismatic Curved Diamond Pattern No Background
Source GDJ
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin