A seamless pattern based on a tile that can be achieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Lovely pattern with splattered vintage speckles.
Source David Pomfret
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
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
Continuing the geometric trend, here is one more.
Source Mike Warner
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin