A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Sharp pixel pattern, just like the good old days.
Source Paridhi
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
Prismatic Groovy Concentric Background No Black
Source GDJ
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile