Sometimes you just need the simplest thing.
Source Fabricio
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
Tile-able Dark Brown Wood Background. Feel free to use it as a background image in your designs or somewhere on the web. By the way, the color seems to be close to Coffee Brown.
Source V. Hartikainen
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Formed by distorting a JPG from PublicDomainPictures
Source Firkin