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
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Black And White Floral Pattern Background Inverse
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background
Source GDJ
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo