There are many carbon patterns, but this one is tiny.
Source Designova
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Retro Circles Background 5 No Black
Source GDJ
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel