A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
A bit strange this one, but nice at the same time.
Source Diogo Silva
Prismatic Geometric Pattern Background No Black
Source GDJ
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Prismatic Curved Diamond Pattern No Background
Source GDJ
Prismatic Triangular Background Design Mark II 5
Source GDJ
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Spice up your next school project with this icon background.
Source Swetha
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Derived from a drawing in 'Historiske Afhandlinger', Adolf Jorgensen, 1898.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin