Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen