Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
A seamless background texture of old cardboard.
Source V. Hartikainen
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Prismatic Chevrons Pattern 5 With Background
Source GDJ
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Prismatic Geometric Pattern Background
Source GDJ
Prismatic Chevrons Pattern 5 With Background
Source GDJ
Looks like an old rug or a computer chip.
Source Patutin Sergey
A nice and simple white rotated tile pattern.
Source Another One
Prismatic Snowflakes Pattern No Background
Source GDJ
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso