Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A white version of the very popular linen pattern.
Source Ant Ekşiler
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Light and tiny, just the way you like it.
Source Rohit Arun Rao
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
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
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper