A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Continuing the geometric trend, here is one more.
Source Mike Warner
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Sort of reminds me of those old house wallpapers.
Source Tish
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Geometric triangles seem to be quite hot these days.
Source Pixeden
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
From an image on opengameart.org shared by rubberduck.
Source Firkin
Abstract Tiled Background Extended 11
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Background formed from the original with an emboss effect
Source GDJ