It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Abstract Tiled Background Extended 10
Source GDJ
Subtle scratches on a light gray background.
Source Andrey Ovcharov
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
This is a remix of "flower seamless pattern".I rotated the original image by 90 degrees.This is a seamless pattern of flowers.These horizontal wavy lines are one of Edo patterns which is called "tatewaku or tachiwaku or 立湧" that represents uprising steam or vapor.
Source Yamachem
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
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
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev