White circles connecting on a light gray background.
Source Mark Collins
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Colorful Floral Background 3 No Black
Source GDJ
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
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
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
There are many carbon patterns, but this one is tiny.
Source Designova
A seamless texture of worn out "cardboard".
Source V. Hartikainen
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
This one needs to be used in small areas; you can see it repeat.
Source Luca
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ