You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
A seamless pattern based on a tile that can be achieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen
A seamless marble-like texture colored in light blue.
Source V. Hartikainen
Embossed lines and squares with subtle highlights.
Source Alex Parker
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern formed from background pattern 102
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Might not be super subtle, but quite original in its form.
Source Alex Smith
To get the repeating unit, select the rectangle in Inkscape and use 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
Prismatic Geometric Pattern Background 2
Source GDJ
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Medium gray pattern with small strokes to give a weave effect.
Source Catherine