If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Tiny circle waves, almost like the ocean.
Source Sagive
More in the paper realm, this time with fibers.
Source Jorge Fuentes
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Abstract Ellipses Background Grayscale
Source GDJ
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
The image is a seamless pattern which is derived from a vine .Consequently, the vine got like dots via vectorization.The original vine is here:jp.pinterest.com/pin/500744052301410188/
Source Yamachem
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This is the remix of "Colorful Floral Pattern Background 3" uploaded by "GDJ". Thanks.
Source Yamachem
A version without colours blended together to give a different look.
Source Firkin
A cute x, if you need that sort of thing.
Source Juan Scrocchi
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin