Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
A bit strange this one, but nice at the same time.
Source Diogo Silva
A gray background pattern with a texture of textile. Suits perfectly for web design.
Source V. Hartikainen
This could be a hippy vintage wallpaper.
Source Tileable Patterns
Prismatic Abstract Geometric Background 3
Source GDJ
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
White little knobs, coming in at 10x10px. Sweet!
Source Amos
Abstract Tiled Background Extended 12
Source GDJ
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Prismatic Snowflakes Pattern No Background
Source GDJ
Lovely pattern with splattered vintage speckles.
Source David Pomfret
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin