From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Looks like an old wall. I guess that’s it then?
Source Viahorizon
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
A seamless canvas texture for using as background on websites. Colored in pale tones of brown.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is a remix of "geometrical pattern 01".
Source Yamachem
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Continuing the geometric trend, here is one more.
Source Mike Warner
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
It’s big, it’s gradient—and it’s square.
Source Brankic1979
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin