To get the repeating unit, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
An alternative colour scheme for the original background.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett