I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
There are many carbon patterns, but this one is tiny.
Source Designova
A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
The image depicts polka dot seamless pattern.
Source Yamachem
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
Tiny circle waves, almost like the ocean.
Source Sagive
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
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
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
Continuing the geometric trend, here is one more.
Source Mike Warner
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
Prismatic Groovy Concentric Background 3
Source GDJ
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo