Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Psychedelic Geometric Background No Black
Source GDJ
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
This was formed by distorting an image of a background on Pixabay.
Source Firkin
From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen
From an image on opengameart.org shared by rubberduck.
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
A new one called white wall, not by me this time.
Source Yuji Honzawa
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin