Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A seamless pattern formed from background pattern 102
Source Firkin
A lot of people like the icon patterns, so here’s one for your restaurant blog.
Source Andrijana Jarnjak
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous