Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
The image depicts a pattern of regular hexagon.As I made to use it for myself,I want to others to use it.Speaking about the ratio of the image, height : width = 2 : √3(1.732...)Ridiculous to say,I realized later that this image is not honey comb pattern.I have to slide the second row.
Source Yamachem
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
An alternative colour scheme for the original background.
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin