A textured blue background pattern with vertical stripes.
Source V. Hartikainen
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
A bit of scratched up grayness. Always good.
Source Dmitry
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Prismatic Polyskelion Pattern No Background
Source GDJ
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo