You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Light and tiny, just the way you like it.
Source Rohit Arun Rao
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim