"Polished Stone", Gray Background Pattern #1053
Stone CC BY-SA 3.0A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
More Textures
Leafy pattern grass and green #1966
Green CC 0Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background #385
Noise CC 0Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Strange Bullseyes@2X #866
Light CC BY-SA 3.0This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Background pattern 271 #2058
Dark CC 0Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Prismatic Hexagonalist Pattern No Background@2X #804
Light CC 0Prismatic Hexagonalist Pattern No Background
Source GDJ
Interlocking pattern 3 (colour 2) #2405
Grid CC 0A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
Background pattern 8 (colour) #211
Noise CC 0Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Background pattern 215 (colour 2) #2370
Blue CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Leafy pattern 10 #1775
Dark CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Light Honeycomb #59
Light CC BY-SA 3.0Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Straws #972
Light CC BY-SA 3.0Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Wood Stripe Pattern #999
Stripes CC BY-SA 3.0A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
Dimension@2X #1174
Light CC BY-SA 3.0Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Tree Bark #1182
Light CC BY-SA 3.0This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
Triangles@2X #128
Dark CC BY-SA 3.0Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
ecorative divider 190 #2516
Dark CC 0From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
tortoise in tortoiseshell #2537
Grid CC 0The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
Soft Kill #318
Dark CC BY-SA 3.0Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Cardboard@2X #279
Paper CC BY-SA 3.0A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Pool Table@2X #176
Wall CC BY-SA 3.0This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Flower Trail #741
Noise CC BY-SA 3.0Sharp pixel pattern, just like the good old days.
Source Paridhi
Floral design 88 #1876
Dark CC 0From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin