Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
A blue background wallpaper for websites. It has a seamless texture with vertical stripes. It looks quite nice not only when using as a tiled background on websites, but also on computer desktops.
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Subtle scratches on a light gray background.
Source Andrey Ovcharov
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A pale olive green background with a seamless texture.
Source V. Hartikainen
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Embossed lines and squares with subtle highlights.
Source Alex Parker
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Prismatic Curved Diamond Pattern No Background
Source GDJ