Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Old China with a modern twist, take two.
Source Adam Charlts
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Alternative colour scheme to the original.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Continuing the geometric trend, here is one more.
Source Mike Warner
Looks like an old wall. I guess that’s it then?
Source Viahorizon
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Prismatic Polyskelion Pattern No Background
Source GDJ
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle