A comeback for you: the popular Escheresque, now in black.
Source Patten
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
An alternative colour scheme to the original seamless pattern.
Source Firkin
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
Background formed from the original with an emboss effect
Source GDJ
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin