One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
An alternative colour scheme for the original seamless texture formed from an image on Pixabay.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Abstract Tiled Background Extended 8
Source GDJ
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo