Embossed lines and squares with subtle highlights.
Source Alex Parker
Prismatic Hypnotic Pattern No Background
Source GDJ
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin