Seamless Cardboard Texture #1212
Cardboard CC BY-SA 3.0A free background image with a seamless texture of cardboard. This texture of cardboard looks quite realistic, especially when is actually tiled.
Source V. Hartikainen
More Textures
Seamless tile 4 #1812
Red CC 0Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Connected #348
Light CC BY-SA 3.0White circles connecting on a light gray background.
Source Mark Collins
Floral design 95 #1790
Green CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Office #957
Dark CC BY-SA 3.0I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Brick #1373
Wall CC 0Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Repeating Stone-Like Background (Dark Brown) #1056
Stone CC BY-SA 3.0A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
Source V. Hartikainen
Background pattern 333 #1741
Noise CC 0The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Zodiac sign symbol background #1927
Red CC 0Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Merely Cubed #589
Grid CC BY-SA 3.0Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Background pattern 9 (colour) #214
Noise CC 0Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Wavy background #2023
Pink CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Concrete Wall 2 #79
Wall CC BY-SA 3.0A light gray wall or floor (you decide) of concrete.
Source Atle Mo
fawn spot pattern #2472
Dark CC 0The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
Background pattern 267 #2067
Dark CC 0Remixed from a drawing in 'An Index to Deering's Nottinghamia Vetus et Nova', Rupert Chicken, 1899. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Background pattern 252 (colour 2) #2156
Brown CC 0Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless Texture of Wood Planks #880
Wood CC BY-SA 3.0Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Lorem Ipsum Background #1071
Paper CC BY-SA 3.0An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
Soft Pad@2X #614
Fabric CC BY-SA 3.0Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Arches #715
Light CC BY-SA 3.0One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
fishnet 02 #2473
Dark CC 0This is a more minute version of "fishnet 01".The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Brushed Alum #67
Light CC BY-SA 3.0A light brushed aluminum pattern for your pleasure.
Source Tim Ward