A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.
Source Yamachem
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Prismatic Abstract Line Art Pattern Background
Source GDJ
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
This one has rusty dark brown texture.
Source V. Hartikainen
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus