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
More Textures
Hexabump@2X #954
Dark CC BY-SA 3.0Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Carbon Fiber v2 #105
Carbon CC BY-SA 3.0One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
Redox 01 #849
Light CC BY-SA 3.0Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Background pattern 306 (colour 3) #1880
Colorful CC 0Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Subtle Dots@2X #922
Light CC BY-SA 3.0As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Subtle Surface #925
Light CC BY-SA 3.0Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Maze-seamless pattern #2555
Grid CC 0This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
Leafy divider (colour) #1759
Green CC 0From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Grey Washed Wall@2X #1129
Wall CC BY-SA 3.0This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Triangular #1156
Gray CC BY-SA 3.0Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
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
Lorem Ipsum Background #1071
Paper CC BY-SA 3.0An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
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
Background pattern 251 #2167
Dark CC 0To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Pinstriped Suit@2X #666
Dark CC BY-SA 3.0Just like your old suit, all striped and smooth.
Source Alex Berkowitz