This one is amazing, truly original. Go use it!
Source Viahorizon
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Abstract Background Design
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen