CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Colorful Floral Background 3 No Black
Source GDJ
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin