Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
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
A version without colours blended together to give a different look.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
Prismatic Geometric Pattern Background
Source GDJ
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
A seamless marble-like texture colored in light blue.
Source V. Hartikainen
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
The original enhanced with some gradients.
Source Firkin