Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
A simple bump filter made upon request at irc #inkscape at freenode. Made a screen capture of the making here: https://youtu.be/TGAWYKVLxQw
Source Lazur URH
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Tiny circle waves, almost like the ocean.
Source Sagive
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin