Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
Prismatic Groovy Concentric Background 5
Source GDJ
Neat little photography icon pattern.
Source Hossam Elbialy
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Seamless Dark Grunge Texture. Here's a new grunge texture for use as a background.
Source V. Hartikainen
A bit of scratched up grayness. Always good.
Source Dmitry
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Background pattern originally a PNG drawn in Paint.net
Source Firkin
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma