A seamlessly tileable pink background texture.
Source V. Hartikainen
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Psychedelic Geometric Background No Black
Source GDJ
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
White little knobs, coming in at 10x10px. Sweet!
Source Amos
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
More in the paper realm, this time with fibers.
Source Jorge Fuentes
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
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin