Fix and cc0 to get the tile this is based on.
Source SliverKnight
Green Background Pattern
Source V. Hartikainen
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
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
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
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Abstract Ellipses Background Grayscale
Source GDJ
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Remixed from a PNG that was uploaded to Pixabay by k_jprather
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Retro Circles Background 5 No Black
Source GDJ