A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A seamless background of warped stripes on paper.
Source V. Hartikainen
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
I’m not going to lie – if you submit something with the words Norwegian and Rose in it, it’s likely I’ll publish it.
Source Fredrik Scheide
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Light and tiny, just the way you like it.
Source Rohit Arun Rao
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
This was formed by distorting an image of a background on Pixabay.
Source Firkin
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen