Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
A free pink background pattern.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Black & white version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
This one needs to be used in small areas; you can see it repeat.
Source Luca
A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
A seamless background of warped stripes on paper.
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A cute x, if you need that sort of thing.
Source Juan Scrocchi