To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
It looks very nice I think.
Source V. Hartikainen
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso