Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Classic vertical lines, in all its subtlety.
Source Cody L
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
White circles connecting on a light gray background.
Source Mark Collins
A black tile-able background with paper-like texture.
Source V. Hartikainen
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
You guessed it – looks a bit like cloth.
Source Peax Webdesign
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Geometric triangles seem to be quite hot these days.
Source Pixeden
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Prismatic Geometric Tessellation Pattern No Background
Source GDJ