From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
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
A new one called white wall, not by me this time.
Source Yuji Honzawa
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
Zero CC tileable Crackled Cement (streaks) texture, photographed and made by me. CC0
Source Sojan Janso
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen