Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin