A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
Source V. Hartikainen
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Prismatic Abstract Background Design No Black
Source GDJ
Alternative colour scheme. 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
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
Alternative colour scheme. 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
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers