First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
Number five from the same submitter, makes my job easy.
Source Dima Shiper
A version without colours blended together to give a different look.
Source Firkin
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
Seamless Olive Green Web Background Image
Source V. Hartikainen
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Prismatic Groovy Concentric Background 2
Source GDJ
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
A seamless web texture of "green stone".
Source V. Hartikainen
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper