A yellow tiled background... Blurriness, bokeh effect and rectangles pattern in one mix.
Source V. Hartikainen
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
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
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
You know you love wood patterns, so here’s one more.
Source Richard Tabor
A free background pattern with abstract green tiles.
Source V. Hartikainen
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
This is sort of fresh, but still feels a bit old school.
Source Martuchox
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
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
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.