A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
A seamless web texture with illustration of pale color stains on canvas.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
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
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
Prismatic Hexagonalist Pattern No Background
Source GDJ
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
There are many carbon patterns, but this one is tiny.
Source Designova
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Formed by distorting a JPG from PublicDomainPictures
Source Firkin