Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Gold Triangular Seamless Pattern No Background
Source GDJ
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
This is the remix of "Tileable Wave Pattern 2" uploaded by "Arvin61r58".Thanks.I added a wire-mesh fence seamless pattern as a lower layer.
Source Yamachem
A seamless background pattern with a texture of wood planks. This wood background pattern has vertically arranged planks. You may try to rotate it 90°, to see how it will look like when the wood planks are arranged horizontally.
Source V. Hartikainen
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
A classic dark tile for a bit of vintage darkness.
Source Listvetra
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin