As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Seamless Green Tile Background
Source V. Hartikainen
From a drawing in 'Az Osztrák-Magyar Monarchia irásban és képben', 1885.
Source Firkin
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Plywood Web Background background image for use in web design.
Source V. Hartikainen
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Colour version of the original pattern inspired by the front cover of 'Old and New Paris', Henry Edwards, 1894.
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
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin