Redrawn based on a drawing in 'По Сѣверо-Западу Россіи' Konstantin Sluchevsky, 1897.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
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
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
A blue gray fabric-like texture for websites. An yet another fabric-like texture. It has subtle vertical and diagonal stripes to it.
Source V. Hartikainen
You may use it as is, or modify it as you like.
Source V. Hartikainen
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
A seamless background texture of old cardboard.
Source V. Hartikainen
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin