A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
The classic notebook paper with horizontal stripes.
Source Are Sundnes
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
Prismatic Hexagonalism Pattern No Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
A version without colours blended together to give a different look.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin