A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
You may use it as is, or modify it as you like.
Source V. Hartikainen
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
I’m not going to lie – if you submit something with the words Norwegian and Rose in it, it’s likely I’ll publish it.
Source Fredrik Scheide
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
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