Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
A version without colours blended together to give a different look.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
This one is amazing, truly original. Go use it!
Source Viahorizon
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin