From an image on opengameart.org shared by rubberduck.
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
The image is a design of blue glass.How about using it as background image?
Source Yamachem
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Retro Circles Background 5 No Black
Source GDJ
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
Heavily remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-brown.
Source Yamachem
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
Gold Triangular Seamless Pattern No Background
Source GDJ
Tiny circle waves, almost like the ocean.
Source Sagive
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
The following free background pattern has glossy diagonal stripes as a texture to it, and it's colored in a light blue gray color. This background pattern is suitable for using in web design or any other graphic design projects. This applies to all background patterns here.
Source V. Hartikainen
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom