Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Embossed lines and squares with subtle highlights.
Source Alex Parker
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A seamless web texture of "green stone".
Source V. Hartikainen
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
This one is amazing, truly original. Go use it!
Source Viahorizon
Sort of reminds me of those old house wallpapers.
Source Tish
Prismatic Abstract Background Design No Black
Source GDJ