Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Remixed from a JPG that was uploaded to Pixabay by Osckar
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Prismatic Hexagonalism Pattern No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
This one needs to be used in small areas; you can see it repeat.
Source Luca
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
A version without colours blended together to give a different look.
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zero CC asphalt, pavement, texture, photographed and made by me. CC0 WARNING I FOUND A SEAM ON THIS TEXTURE
Source Sojan Janso
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ