A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Continuing the geometric trend, here is one more.
Source Mike Warner
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
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
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Classic vertical lines, in all its subtlety.
Source Cody L
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Sometimes you just need the simplest thing.
Source Fabricio
A brown metallic grid pattern layered on top of a dark fabric texture. It should look great when using as a tiled background on web pages, especially blogs.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
Inspired by a pattern found in 'A General History of Hampshire, or the County of Southampton, including the Isle of Wight', Bernard Woodwood, 1861
Source Firkin
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin