From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
This one is amazing, truly original. Go use it!
Source Viahorizon
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin