A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Colorful Floral Background 3 No Black
Source GDJ
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Prismatic Abstract Geometric Background 5
Source GDJ
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Sort of like the Photoshop transparent background, but better!
Source Alex Parker