A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Abstract Tiled Background Extended 11
Source GDJ
Redrawn based on a drawing in 'По Сѣверо-Западу Россіи' Konstantin Sluchevsky, 1897.
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Prismatic Groovy Concentric Background 3
Source GDJ
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Here's a new paper-like background for free use on personal and commercial projects (this applies to all background patterns here).
Source V. Hartikainen
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby