Sort of reminds me of those old house wallpapers.
Source Tish
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
White little knobs, coming in at 10x10px. Sweet!
Source Amos
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Light and tiny, just the way you like it.
Source Rohit Arun Rao
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
This was formed by distorting an image of a background on Pixabay.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight