This could be a hippy vintage wallpaper.
Source Tileable Patterns
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Prismatic Abstract Background Design No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
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
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
A seamless background pattern with a texture of wood planks. This wood background pattern has vertically arranged planks. You may try to rotate it 90°, to see how it will look like when the wood planks are arranged horizontally.
Source V. Hartikainen
Fix side and a seamless pattern formed from circles.
Source SliverKnight
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin