Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
From a drawing in 'A Rolling Stone. A tale of wrongs and revenge', John Hartley, 1878.
Source Firkin
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Prismatic Snowflakes Pattern No Background
Source GDJ
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Here's a new background image for websites with a seamless pink texture. It should look beautiful with website themes where light pink background is needed. The background is seamless, therefore it should be used as a tiled background.
Source V. Hartikainen
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
There are many carbon patterns, but this one is tiny.
Source Designova
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker