A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Zero CC tileable brick texture, photographed and made by me. CC0
Source Sojan Janso
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
Abstract Tiled Background Extended 10
Source GDJ
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Remixed from an image that was uploaded to Pixabay by CatherineClennan
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
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
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Inspired by a pattern found in 'A General History of Hampshire, or the County of Southampton, including the Isle of Wight', Bernard Woodwood, 1861
Source Firkin
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo