Diamond pattern (colour 8) #2273
Red CC 0From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
More Textures
Pink Clouds Background #1230
Pink CC BY-SA 3.0Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Gloomy Stripes #994
Stripes CC BY-SA 3.0A dark striped seamless pattern suitable for use as a background on websites.
Source V. Hartikainen
White tiles@2X #728
Grid CC BY-SA 3.0A nice and simple white rotated tile pattern.
Source Another One
Dark Metallic Background Pattern #1088
Metal CC BY-SA 3.0A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
Decorative divider 187 #2522
Dark CC 0From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Diamond Upholstery #767
Diamond CC BY-SA 3.0A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
"Green Rhombuses", Seamless Background Pattern #1336
Green CC BY-SA 3.0A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
Page ornament #1989
Dark CC 0Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Gray Lines #913
Light CC BY-SA 3.0Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Background pattern black #2026
Dark CC 0Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Grid@2X #975
Gray CC BY-SA 3.0There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Vichy #71
Light CC BY-SA 3.0This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Solid@2X #846
Gray CC BY-SA 3.0A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Background pattern 201 (colour 2) #2496
Grid CC 0A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Wild Oliva #988
Dark CC BY-SA 3.0Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Dark Geometric #619
Dark CC BY-SA 3.0Continuing the geometric trend, here is one more.
Source Mike Warner
Background pattern 227 (colour 4) #2311
Green CC 0A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Diagonal Noise@2X #182
Fabric CC BY-SA 3.0A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton