Continuing the geometric trend, here is one more.
Source Mike Warner
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Prismatic Groovy Concentric Background
Source GDJ
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
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
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
A yellow tiled background... Blurriness, bokeh effect and rectangles pattern in one mix.
Source V. Hartikainen
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Alternative colour scheme for the original floral pattern.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen