You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Geometric triangles seem to be quite hot these days.
Source Pixeden
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
A bit of scratched up grayness. Always good.
Source Dmitry
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
This is a hot one. Small, sharp and unique.
Source GraphicsWall
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
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
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
f you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
Green Background Pattern
Source V. Hartikainen
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró