A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
A seamless background texture of old cardboard.
Source V. Hartikainen
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Prismatic Curved Diamond Pattern No Background
Source GDJ