This is sort of fresh, but still feels a bit old school.
Source Martuchox
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
Abstract Tiled Background Extended 12
Source GDJ
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.
Source V. Hartikainen
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
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 an image that was uploaded to Pixabay by mdmelo.
Source Firkin
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev