Tessellation 15 #2223
Dark CC 0The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
More Textures
"Maple", Seamless Wood Texture #883
Wood CC BY-SA 3.0Here I have tried to create something that would look like maple wood. Not sure how well it's turned out, but at least it looks like wood.
Source V. Hartikainen
Psychedelic@2X #746
Gray CC BY-SA 3.0Geometric triangles seem to be quite hot these days.
Source Pixeden
Leafy pattern #2335
Dark CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Tessellation 13 variant 1 #2532
Yellow CC 0Original seamless pattern with an Inkscape filter.
Source Firkin
Rough Cloth@2X #313
Fabric CC BY-SA 3.0More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
Handmade Paper@2X #38
Paper CC BY-SA 3.0White handmade paper pattern with small bumps.
Source Marquis
Bamboo Background Pattern #1330
Green CC BY-SA 3.0This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
Floral design #1984
Green CC 0Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Floral design 96 #1789
Dark CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Noise Lines #897
Paper CC BY-SA 3.0Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Green Background Pattern with Warped Vertical Stripes #968
Stripes CC BY-SA 3.0A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Redox 01@2X #850
Light CC BY-SA 3.0Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Mooning@2X #1141
Gray CC BY-SA 3.0The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Rough Concrete Surface #1195
Concrete CC BY-SA 3.0This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Corrugation #765
Light CC BY-SA 3.0The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
"Black Groove Stripes", Repeating Background #971
Stripes CC BY-SA 3.0A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
Dark Brick Wall@2X #136
Wall CC BY-SA 3.0Black brick wall pattern. Brick your site up!
Source Alex Parker
Gold Triangular Seamless Pattern No Background #272
Light CC 0Gold Triangular Seamless Pattern No Background
Source GDJ
Background pattern 309 (colour 4) #1863
Green CC 0Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Floral design 99 #1776
Dark CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin