Could be paper, could be a Polaroid frame – up to you!
Source Chaos
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
A free seamless texture of reptile skin colored in a dark brown color. As always, you may use it as a repeated background image in your web design works, or for any other purposes.
Source V. Hartikainen
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Black And White Floral Pattern Background from PDP.
Source GDJ
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Retro Circles Background 5 No Black
Source GDJ
Colorful Floral Background 3 No Black
Source GDJ
A blue background wallpaper for websites. It has a seamless texture with vertical stripes. It looks quite nice not only when using as a tiled background on websites, but also on computer desktops.
Source V. Hartikainen
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Rounded Squares Grid 4 No Background
Source GDJ