Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
Seamless Dark Grunge Texture. Here's a new grunge texture for use as a background.
Source V. Hartikainen
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A seamless striped fabric-like texture colored in a dark reddish brown color.
Source V. Hartikainen
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Same classic 45-degree pattern, dark version.
Source Luke McDonald
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
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin