A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Redrawn based on a drawing in 'По Сѣверо-Западу Россіи' Konstantin Sluchevsky, 1897.
Source Firkin
Background pattern originally a PNG drawn in Paint.net
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Neat little photography icon pattern.
Source Hossam Elbialy
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ