A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
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 'A Rolling Stone. A tale of wrongs and revenge', John Hartley, 1878.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
From an image on opengameart.org shared by rubberduck.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
A seamless paper background colored in pale yellow.
Source V. Hartikainen
A free background pattern with abstract green tiles.
Source V. Hartikainen
The image depicts a seamless pattern of Japanese Edo pattern called "kikkou-matsu" or "亀甲松" meaning " tortoiseshell-pinetree".The real pinetree is like this: https://jp.pinterest.com/pin/500744052301065077/
Source Yamachem
The original enhanced with some gradients.
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube