A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin