The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Original seamless pattern with an Inkscape filter.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Retro Circles Background 8 No Black
Source GDJ
Prismatic Hexagonalist Pattern No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
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
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim