By popular request, an outline version of the pentagon pattern.
Source Atle Mo
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
A version without colours blended together to give a different look.
Source Firkin
Prismatic Abstract Geometric Background 4
Source GDJ
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
U.S.-based National Fire Protection Association standard fire diamond for flagging risks posed by hazardous materials. The red diamond has a number 0-4 depending on flammability. The blue diamond has a number 0-4 depending on health hazard. The yellow has a number 0-4 depending on reactivity. the white square has a special notice, e.g OX for oxidizer.
Source Firkin