Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
Retro Circles Background 7 No Black
Source GDJ
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
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
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
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
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
The image depicts polka dot seamless pattern.
Source Yamachem
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Prismatic Chevrons Pattern 5 With Background
Source GDJ
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Prismatic Groovy Concentric Background 2
Source GDJ