To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
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
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
A version without colours blended together to give a different look.
Source Firkin
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
This one needs to be used in small areas; you can see it repeat.
Source Luca
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Kaleidoscope Prismatic Abstract No Background
Source GDJ
A seamless texture of a rough concrete surface.
Source V. Hartikainen
A free background pattern with abstract green tiles.
Source V. Hartikainen
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin