Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Lovely pattern with splattered vintage speckles.
Source David Pomfret