This is a hot one. Small, sharp and unique.
Source GraphicsWall
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
A bit strange this one, but nice at the same time.
Source Diogo Silva
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Abstract Ellipses Background Grayscale
Source GDJ
Black And White Floral Pattern Background from PDP.
Source GDJ
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ