From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
A blue gray fabric-like texture for websites. An yet another fabric-like texture. It has subtle vertical and diagonal stripes to it.
Source V. Hartikainen
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
Abstract Ellipses Background Grayscale
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Abstract Tiled Background Extended 6
Source GDJ
Prismatic Polka Dots Mark II No Background
Source GDJ
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Retro Circles Background 4 No Black
Source GDJ
Might not be super subtle, but quite original in its form.
Source Alex Smith