I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Prismatic Abstract Background Design No Black
Source GDJ
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Alternative colour scheme for the original floral pattern.
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
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
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8