To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
A free seamless background pattern for use on websites.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
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
Prismatic Groovy Concentric Background No Black
Source GDJ
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos