Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Embossed lines and squares with subtle highlights.
Source Alex Parker
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Prismatic Abstract Geometric Background 2
Source GDJ
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Prismatic Groovy Concentric Background 3
Source GDJ
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin