Fix and cc0 to get the tile this is based on.
Source SliverKnight
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
There are many carbon patterns, but this one is tiny.
Source Designova
A simple bump filter made upon request at irc #inkscape at freenode. Made a screen capture of the making here: https://youtu.be/TGAWYKVLxQw
Source Lazur URH
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Colour version of the original pattern.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
A free background pattern with abstract green tiles.
Source V. Hartikainen
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen