Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
A black tile-able background with paper-like texture.
Source V. Hartikainen
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
Prismatic Snowflakes Pattern No Background
Source GDJ