Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
A seamless background texture of old cardboard.
Source V. Hartikainen
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
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
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
Someone was asking about how to achieve a fur pattern at #inkscape irc so tried to make a filter on it. Flood filled fractal noises rigged together. May someone find a good use for these.
Source Lazur URH
White little knobs, coming in at 10x10px. Sweet!
Source Amos
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
Looks like an old rug or a computer chip.
Source Patutin Sergey
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim