A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
It’s big, it’s gradient—and it’s square.
Source Brankic1979
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
This one is quite simple in design, it consists of vertical stripes layered on top of a seamless texture.
Source V. Hartikainen
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos