Colorful Floral Background 3 No Black
Source GDJ
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Colourful background achieved with gradient fills.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
Classic vertical lines, in all its subtlety.
Source Cody L
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
A browner version of the original weathered fence texture.
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor