You may use it as is, or modify it as you like.
Source V. Hartikainen
Almost like little fish shells, or dragon skin.
Source Graphiste
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Remixed 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
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
A free seamless background with pink spots.
Source V. Hartikainen
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
You may use it as is, or modify it as you like.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A classic dark tile for a bit of vintage darkness.
Source Listvetra
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo