I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
An alternative colour scheme for the original background.
Source Firkin
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Continuing the geometric trend, here is one more.
Source Mike Warner
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
Number five from the same submitter, makes my job easy.
Source Dima Shiper
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Spice up your next school project with this icon background.
Source Swetha
A nice and simple white rotated tile pattern.
Source Another One
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin