White circles connecting on a light gray background.
Source Mark Collins
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Clover with background for St. Patrick's Day. Add to a card with a doily, ribbon, a leprechaun or other embellishments.
Source BAJ
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
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
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Prismatic Polka Dots Mark II No Background
Source GDJ
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Prismatic Hexagonalism Pattern No Background
Source GDJ
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin