A background pattern with blue on white vertical stripes.
Source V. Hartikainen
Prismatic Geometric Pattern Background
Source GDJ
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Used a cherry by doctormo to make this seamless pattern
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sometimes you just need the simplest thing.
Source Fabricio
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
The image is a seamless pattern of a fishnet.
Source Yamachem