Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Looks like an old rug or a computer chip.
Source Patutin Sergey
Abstract Tiled Background Extended 10
Source GDJ
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using 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
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Alternative colour scheme for the original floral pattern.
Source Firkin
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Abstract Background Design No Black
Source GDJ
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry