Black brick wall pattern. Brick your site up!
Source Alex Parker
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Remixed from a drawing in 'Kulturgeschichte der Deutschen im Mittelalter' Franz von Loeher, 1891. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock