A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
A bit strange this one, but nice at the same time.
Source Diogo Silva
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
A background pattern with a look of rough fabric.
Source V. Hartikainen
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin