Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Abstract Ellipses Background Grayscale
Source GDJ
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
A seamless pattern formed from background pattern 102
Source Firkin
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
This one has rusty dark brown texture.
Source V. Hartikainen
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
This light blue background pattern is quite pleasing to the eye, it consists of a tiny rough grid pattern, which is seamless by design. That's it, if you like the color, you can use this seamless pattern in a web design without making any further modifications to it.
Source V. Hartikainen
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Alternative colour scheme for the original floral pattern.
Source Firkin
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin