The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
Prismatic Floral Background No Black
Source GDJ
A pale olive green background with a seamless texture.
Source V. Hartikainen
A free pink background pattern.
Source V. Hartikainen
Feel free to use this seamless background texture as a background on a web site. It's colored in a light pink color and is seamlessly tile-able.
Source V. Hartikainen
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
An alternative colour scheme for the original background.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts