Could be paper, could be a Polaroid frame – up to you!
Source Chaos
U.S.-based National Fire Protection Association standard fire diamond for flagging risks posed by hazardous materials. The red diamond has a number 0-4 depending on flammability. The blue diamond has a number 0-4 depending on health hazard. The yellow has a number 0-4 depending on reactivity. the white square has a special notice, e.g OX for oxidizer.
Source Firkin
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
This one needs to be used in small areas; you can see it repeat.
Source Luca
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Abstract Ellipses Background Grayscale
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.
Source Yamachem
Seamless pattern formed from a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Sometimes you just need the simplest thing.
Source Fabricio
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin