Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
A free seamless background pattern for use on websites.
Source V. Hartikainen
Prismatic Geometric Tessellation Pattern No Background
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
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
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
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Someone was asking about how to achieve a fur pattern at #inkscape irc so tried to make a filter on it. Flood filled fractal noises rigged together. May someone find a good use for these.
Source Lazur URH
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Prismatic Abstract Background Design
Source GDJ
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin