A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Derived from a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Used a cherry by doctormo to make this seamless pattern
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Background pattern originally a PNG drawn in Paint.net
Source Firkin
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
This white background pattern has a seamless grunge style texture. Here's a white grunge style background pattern. Use it as a tiled background image on web sites or for other purposes.
Source V. Hartikainen
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat