The classic notebook paper with horizontal stripes.
Source Are Sundnes
Looks like an old wall. I guess that’s it then?
Source Viahorizon
One more sharp little tile for you. Subtle circles this time.
Source Blunia
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
Zero CC tileable yellow craft paper; scanned and made by me. CC0
Source Sojan Janso
Prismatic Groovy Concentric Background No Black
Source GDJ
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a drawing in 'Prose and Verse ', William Linton, 1836.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
A pattern derived from part of a fractal rendering in Paint.net.
Source Firkin
Retro Circles Background 4 No Black
Source GDJ
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin