A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Geometric Pattern Background
Source GDJ
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
Prismatic Groovy Concentric Background No Black
Source GDJ
A bit strange this one, but nice at the same time.
Source Diogo Silva
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin