I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
A classic dark tile for a bit of vintage darkness.
Source Listvetra
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo