A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Groovy Concentric Background 5
Source GDJ
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin
Prismatic Abstract Geometric Background 2
Source GDJ
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
Colorful Floral Background 3 No Black
Source GDJ
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Black And White Floral Pattern Background Inverse
Source GDJ
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
This could be a hippy vintage wallpaper.
Source Tileable Patterns