Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
An alternative colour scheme for the original seamless texture formed from an image on Pixabay.
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen