Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
Prismatic Polka Dots Mark II No Background
Source GDJ
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
The image a seamless pattern derived from a weed which I can't identify.The original weed image is from here:https://jp.pinterest.com/pin/500744052301423641/
Source Yamachem
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
The image is the remix of "wire-mesh fence seamless pattern" .This is a more minute version of it.Sorry for the file size.Using path>difference in Inkscape, I will cut out any silhouette from this pattern and create a "meshed silhouette".
Source Yamachem
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin