To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Psychedelic Geometric Background No Black
Source GDJ
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Prismatic Hexagonalist Pattern No Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Seamless Dark Grunge Texture. Here's a new grunge texture for use as a background.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A bit of scratched up grayness. Always good.
Source Dmitry
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin