A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
You may use it as is, or modify it as you like.
Source V. Hartikainen
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
A new one called white wall, not by me this time.
Source Yuji Honzawa
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Embossed lines and squares with subtle highlights.
Source Alex Parker