Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Abstract Tiled Background Extended 11
Source GDJ
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Groovy Concentric Background 3
Source GDJ
Classic vertical lines, in all its subtlety.
Source Cody L
Geometric triangles seem to be quite hot these days.
Source Pixeden
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
A floral background formed from numerous clones of flower 117.
Source Firkin
This one is quite simple in design, it consists of vertical stripes layered on top of a seamless texture.
Source V. Hartikainen
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo