Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Abstract Tiled Background Extended 10
Source GDJ
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
U.S.-based National Fire Protection Association standard fire diamond for flagging risks posed by hazardous materials. The red diamond has a number 0-4 depending on flammability. The blue diamond has a number 0-4 depending on health hazard. The yellow has a number 0-4 depending on reactivity. the white square has a special notice, e.g OX for oxidizer.
Source Firkin