A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
A seamless web texture of "green stone".
Source V. Hartikainen
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Prismatic Snowflakes Pattern No Background
Source GDJ
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Background Design No Black
Source GDJ
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin