A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless web texture of "green stone".
Source V. Hartikainen
Retro Circles Background 7 No Black
Source GDJ
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
This is a remix of "geometrical pattern 01".
Source Yamachem
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim