One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Prismatic Groovy Concentric Background 4
Source GDJ
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
A free pink background pattern.
Source V. Hartikainen
This one needs to be used in small areas; you can see it repeat.
Source Luca
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
The image depicts polka dot seamless pattern.
Source Yamachem
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Psychedelic Geometric Background No Black
Source GDJ
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
It’s big, it’s gradient—and it’s square.
Source Brankic1979
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Inspired by a pattern I saw in a 19th century book. This seamless pattern was created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen