This is sort of fresh, but still feels a bit old school.
Source Martuchox
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
A textured blue background pattern with vertical stripes.
Source V. Hartikainen
Prismatic Abstract Line Art Pattern Background
Source GDJ
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
This one is amazing, truly original. Go use it!
Source Viahorizon
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Prismatic Hexagonalism Pattern No Background
Source GDJ
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks