Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
This was formed by distorting an image of a background on Pixabay.
Source Firkin
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
You know you love wood patterns, so here’s one more.
Source Richard Tabor
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin