Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Neat little photography icon pattern.
Source Hossam Elbialy
From a drawing in 'Kingsdene', Maria Fetherstonehaugh, 1878.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
From a drawing in 'An Old Maid's Love. A Dutch tale told in English', Maarten Maartens, 1891.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
The image depicts polka dot seamless pattern.
Source Yamachem
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Prismatic Hexagonalism Pattern No Background
Source GDJ
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin