Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
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
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Continuing the geometric trend, here is one more.
Source Mike Warner
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
White circles connecting on a light gray background.
Source Mark Collins
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ