To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Seamless Green Tile Background
Source V. Hartikainen
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
A free seamless background pattern for use on websites.
Source V. Hartikainen
Prismatic Snowflakes Pattern No Background
Source GDJ
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
Prismatic Geometric Pattern Background 2
Source GDJ
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
A comeback for you: the popular Escheresque, now in black.
Source Patten