The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
An alternative colour scheme for the original background.
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
A pale olive green background with a seamless texture.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Abstract Tiled Background Extended 8
Source GDJ
Prismatic Groovy Concentric Background
Source GDJ
A tile-able background for websites with paper-like texture and a grid pattern layered on top of it.
Source V. Hartikainen
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
Element of beach pattern with background.
Source Rones
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo