Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
A background pattern with blue on white vertical stripes.
Source V. Hartikainen