Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Prismatic Geometric Pattern Background
Source GDJ
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
White little knobs, coming in at 10x10px. Sweet!
Source Amos
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso