This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
A nice and simple white rotated tile pattern.
Source Another One
This was formed by distorting an image of a background on Pixabay.
Source Firkin
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin