This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Prismatic Groovy Concentric Background 5
Source GDJ
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
The image is a seamless pattern which is derived from a vine .Consequently, the vine got like dots via vectorization.The original vine is here:jp.pinterest.com/pin/500744052301410188/
Source Yamachem
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Classic 45-degree pattern, light version.
Source Luke McDonald
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
White circles connecting on a light gray background.
Source Mark Collins
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH