Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
A seamless pattern the unit cell for which 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
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
This light blue background pattern is quite pleasing to the eye, it consists of a tiny rough grid pattern, which is seamless by design. That's it, if you like the color, you can use this seamless pattern in a web design without making any further modifications to it.
Source V. Hartikainen
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A new one called white wall, not by me this time.
Source Yuji Honzawa
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Abstract Tiled Background Extended 11
Source GDJ
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox