A version without colours blended together to give a different look.
Source Firkin
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
A free seamless background with pink spots.
Source V. Hartikainen
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Green Background Pattern
Source V. Hartikainen
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
White circles connecting on a light gray background.
Source Mark Collins
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen