The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
A bit of scratched up grayness. Always good.
Source Dmitry
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
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
A version without colours blended together to give a different look.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Black And White Floral Pattern Background from PDP.
Source GDJ
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin