A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
A seamless web texture with illustration of pale color stains on canvas.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Derived from a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Prismatic Polka Dots 3 No Background
Source GDJ
Kaleidoscope Prismatic Abstract No Background
Source GDJ
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
This is the remix of an OCAL clipart called "Rain on Window" uploaded by "pagarmidna".Thanks.This is a seamless pattern of raindrops.
Source Yamachem