Lovely pattern with some good-looking non-random noise lines.
Source Zucx
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
From a drawing in 'Hyde Park from Domesday-Book to date', John Ashton, 1896.
Source Firkin
Abstract Tiled Background Extended 11
Source GDJ
A cute x, if you need that sort of thing.
Source Juan Scrocchi
From a tile that 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
Background pattern made in "Grunge-Like" style. Available in both SVG and JPG formats. Edit to your needs then click the download button.
Source V. Hartikainen
Prismatic Hexagonalist Pattern No Background
Source GDJ
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin