Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A free pink background pattern.
Source V. Hartikainen
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
A browner version of the original weathered fence texture.
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
A seamless web texture of "green stone".
Source V. Hartikainen
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen