From a drawing in 'Hyde Park from Domesday-Book to date', John Ashton, 1896.
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Continuing the geometric trend, here is one more.
Source Mike Warner
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Sharp but soft triangles in light shades of gray.
Source Pixeden
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Black And White Floral Pattern Background from PDP.
Source GDJ
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry