From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
Prismatic Groovy Concentric Background 3
Source GDJ
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen