Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamlessly tile-able grunge background image.
Source V. Hartikainen
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Classic vertical lines, in all its subtlety.
Source Cody L
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Retro Circles Background 4 No Black
Source GDJ
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
Alternative colour scheme to the original.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin