This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Prismatic Groovy Concentric Background
Source GDJ
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Colour version of the original seamless pattern.
Source Firkin
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Prismatic Polka Dots Mark II No Background
Source GDJ
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
Abstract Tiled Background Extended 11
Source GDJ
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A classic dark tile for a bit of vintage darkness.
Source Listvetra
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Background formed from the original with an emboss effect
Source GDJ