Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A new one called white wall, not by me this time.
Source Yuji Honzawa
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
The image is a seamless pattern of a fishnet.
Source Yamachem
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
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
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Prismatic Abstract Geometric Background 4
Source GDJ