Geometric triangles seem to be quite hot these days.
Source Pixeden
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
Sharp pixel pattern, just like the good old days.
Source Paridhi
A classic dark tile for a bit of vintage darkness.
Source Listvetra
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Here is a new seamless wood texture for using as blog or website backgrounds.
Source V. Hartikainen
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Green Background Pattern
Source V. Hartikainen
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin