Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
Prismatic Geometric Pattern Background
Source GDJ
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
The original enhanced with one of Inkscapes's filters.
Source Firkin
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
You may use it as is, or modify it as you like.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
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
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
A repeating background of beige (or is it more vanilla yellow) textured stripes. One more background with stripes.
Source V. Hartikainen
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A version without colours blended together to give a different look.
Source Firkin
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin