I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
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
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin