A comeback for you: the popular Escheresque, now in black.
Source Patten
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Alternative colour scheme for the original floral pattern.
Source Firkin
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
The tile can be had by using shift+alt+i on the selected rectangle in Inkscape
Source Firkin
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
A seamless pattern formed from background pattern 102
Source Firkin