I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Colorful Floral Background No Black
Source GDJ
Number five from the same submitter, makes my job easy.
Source Dima Shiper
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
f you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
A free seamless background pattern for use on websites.
Source V. Hartikainen
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz