From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
It looks very nice I think.
Source V. Hartikainen
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Green Background Pattern
Source V. Hartikainen
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A tile-able background for websites with paper-like texture and a grid pattern layered on top of it.
Source V. Hartikainen
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Polka Dots Mark II No Background
Source GDJ
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen