A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Prismatic Groovy Concentric Background 2
Source GDJ
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo