This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Geometric triangles seem to be quite hot these days.
Source Pixeden
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
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
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Colour version of the original pattern.
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
A heavy hitter at 400x400px, but lovely still.
Source Breezi
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen