Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
There are many carbon patterns, but this one is tiny.
Source Designova
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
White circles connecting on a light gray background.
Source Mark Collins
I’m not going to use the word Retina for all the new patterns, but it just felt right for this one. Huge wood pattern for ya’ll.
Source Atle Mo
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Prismatic Hexagonalism Pattern No Background
Source GDJ
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Prismatic Groovy Concentric Background 3 No Black
Source GDJ