A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Prismatic Abstract Background Design
Source GDJ
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Remixed from a drawing in 'Kulturgeschichte der Deutschen im Mittelalter' Franz von Loeher, 1891. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Zero CC asphalt, pavement, texture, photographed and made by me. CC0 WARNING I FOUND A SEAM ON THIS TEXTURE
Source Sojan Janso
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Spice up your next school project with this icon background.
Source Swetha
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
The base gradient edited so now more details are rendered.
Source Lazur URH
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
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
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin