Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
There are many carbon patterns, but this one is tiny.
Source Designova
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Prismatic Abstract Geometric Background 3
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
An alternative colour scheme to the original seamless pattern.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler