A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
The classic notebook paper with horizontal stripes.
Source Are Sundnes
A seamless paper background texture colored in pale yellow. This seamless texture is ideal for those who need a yellow background image for their website. The texture resembles paper.
Source V. Hartikainen
Prismatic Abstract Background Design No Black
Source GDJ
Prismatic Abstract Geometric Background 4
Source GDJ
Colorful Floral Background No Black
Source GDJ
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Neat little photography icon pattern.
Source Hossam Elbialy
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
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
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars