Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Prismatic Abstract Background Design
Source GDJ
An alternative colour scheme to the original seamless pattern.
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
A free background pattern with abstract green tiles.
Source V. Hartikainen
Prismatic Groovy Concentric Background No Black
Source GDJ
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective