Subtle Dark Vertical@2X #608
Dark CC BY-SA 3.0Classic vertical lines, in all its subtlety.
Source Cody L
More Textures
Tree and bird pattern #1982
Green CC 0From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
honeycomb-regular hexagon #2540
Grid CC 0This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
Wide Rectangles #699
Wall CC BY-SA 3.0Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
"Dark Brick Wall", Background Pattern #1024
Stone CC BY-SA 3.0Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Diagonales Decalées #1018
Light CC BY-SA 3.0Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Prismatic Groovy Concentric Background 5 No Black@2X #468
Dark CC 0Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Climpek@2X #776
Grid CC BY-SA 3.0Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
Background pattern 200 variant #2505
Pink CC 0A version without colours blended together to give a different look.
Source Firkin
Grid Me #605
Grid CC BY-SA 3.0Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
45-Degree Fabric@2X #2
Fabric CC BY-SA 3.0Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Zig-zag pattern #2418
Grid CC 0A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Brushed Alum Dark@2X #66
Dark CC BY-SA 3.0Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Hexellence@2X #706
Light CC BY-SA 3.0Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Small Steps #1312
Light CC BY-SA 3.0This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
Stacked Circles@2X #674
Light CC BY-SA 3.0A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Pattern #1476
Paper CC 0Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
Carbon Fiber #3
Carbon CC BY-SA 3.0A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
Decorative divider 189 #2518
Dark CC 0From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Retro Intro@2X #894
Gray CC BY-SA 3.0A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab