This could be a hippy vintage wallpaper.
Source Tileable Patterns
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Prismatic Abstract Background Design
Source GDJ
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Classic vertical lines, in all its subtlety.
Source Cody L
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A white version of the very popular linen pattern.
Source Ant Ekşiler
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Continuing the geometric trend, here is one more.
Source Mike Warner
Prismatic Abstract Background Design
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
A pattern formed from repeated instances of corner decoration 8. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
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
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo