A seamless background of warped stripes on paper.
Source V. Hartikainen
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Zero CC tileable dry grass texture, photographed and made by me. CC0
Source Sojan Janso
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
Seamless Dark Grunge Texture. Here's a new grunge texture for use as a background.
Source V. Hartikainen
One more sharp little tile for you. Subtle circles this time.
Source Blunia
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin