Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Use shift+alt+i on the selected rectangle in Inkscape to get the tile this is based on
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Zero CC tileable grass texture, photographed and made by me. CC0
Source Sojan Janso
White circles connecting on a light gray background.
Source Mark Collins
A bit of scratched up grayness. Always good.
Source Dmitry
Geometric triangles seem to be quite hot these days.
Source Pixeden