This was formed by distorting an image of a background on Pixabay.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless background of warped stripes on paper.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Background pattern made in "Grunge-Like" style. Available in both SVG and JPG formats. Edit to your needs then click the download button.
Source V. Hartikainen
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
Prismatic Groovy Concentric Background
Source GDJ
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
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
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen