Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
There are many carbon patterns, but this one is tiny.
Source Designova
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
From an image on opengameart.org shared by rubberduck.
Source Firkin
A seamless marble-like texture colored in light blue.
Source V. Hartikainen
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin