Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A seamless web texture with illustration of pale color stains on canvas.
Source V. Hartikainen
This is the remix of "Tileable Wave Pattern 2" uploaded by "Arvin61r58".Thanks.I added a wire-mesh fence seamless pattern as a lower layer.
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
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
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
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 green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Prismatic Geometric Pattern Background 2
Source GDJ
The classic notebook paper with horizontal stripes.
Source Are Sundnes
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
Psychedelic Geometric Background No Black
Source GDJ
A browner version of the original weathered fence texture.
Source Firkin