From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
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
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Prismatic Hexagonalist Pattern No Background
Source GDJ
Prismatic Abstract Background Design
Source GDJ
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless canvas texture for using as background on websites. Colored in pale tones of brown.
Source V. Hartikainen
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Number five from the same submitter, makes my job easy.
Source Dima Shiper
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Colorful Floral Background No Black
Source GDJ
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks