Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
The image depicts polka dot seamless pattern.
Source Yamachem
A seamless pattern formed from a square tile based on a jpg on Pixabay. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
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
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin