Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
The tile can be had by selecting the rectangle in Inkscape and using shift+alt+i. Remixed from a drawing in 'Flowers of Song', Frederick Weatherly, 1895.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
From an image on opengameart.org shared by rubberduck.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A dark striped seamless pattern suitable for use as a background on websites.
Source V. Hartikainen
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis