Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Sharp pixel pattern, just like the good old days.
Source Paridhi
Colour version of the original pattern inspired by the front cover of 'Old and New Paris', Henry Edwards, 1894.
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
This metal background pattern resembles a metal plate with rivets. Solid rivets on a metal plate.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
Oh yes, it happened! A pattern in full color.
Source Atle Mo
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Prismatic Polyskelion Pattern No Background
Source GDJ
Prismatic Polka Dots 3 No Background
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin