Zero CC tileable grass texture, photographed and made by me. CC0
Source Sojan Janso
A seamless marble-like texture colored in light blue.
Source V. Hartikainen
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Inspired by an image that was uploaded to Pixabay by geralt
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
A comeback for you: the popular Escheresque, now in black.
Source Patten
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
An alternative colour scheme to the original seamless pattern.
Source Firkin
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 created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
A bit strange this one, but nice at the same time.
Source Diogo Silva
A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen