A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A free light orange brown wallpaper with vertical stripes designed for use as a tiled background on websites. An yet another background pattern with vertical stripes.
Source V. Hartikainen
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas