From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Prismatic Polka Dots 3 No Background
Source GDJ
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
This one needs to be used in small areas; you can see it repeat.
Source Luca
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
A seamless web texture with illustration of pale color stains on canvas.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Heavily remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso