Background pattern originally a PNG drawn in Paint.net
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Looks like an old rug or a computer chip.
Source Patutin Sergey
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
The image is a seamless pattern which is derived from a vine .Consequently, the vine got like dots via vectorization.The original vine is here:jp.pinterest.com/pin/500744052301410188/
Source Yamachem
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective