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
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
A free background pattern with abstract green tiles.
Source V. Hartikainen
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
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
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Inspired by a pattern found in 'A General History of Hampshire, or the County of Southampton, including the Isle of Wight', Bernard Woodwood, 1861
Source Firkin
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin