Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
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
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
8 by 8 pixels, and just what the title says.
Source pixilated
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
Prismatic Hypnotic Pattern No Background
Source GDJ
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
This is a more minute version of "fishnet 01".The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
Black And White Floral Pattern Background from PDP.
Source GDJ
Embossed lines and squares with subtle highlights.
Source Alex Parker
Prismatic Abstract Geometric Background 4
Source GDJ
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin