This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Prismatic Abstract Geometric Background 4
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Original seamless pattern with an Inkscape filter.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
White circles connecting on a light gray background.
Source Mark Collins
Sometimes you just need the simplest thing.
Source Fabricio
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Here's a new paper-like background for free use on personal and commercial projects (this applies to all background patterns here).
Source V. Hartikainen
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Seamless SVG vector and JPG backgrounds with faded diagonal stripes. The colors are editable.
Source V. Hartikainen
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
This one is quite simple in design, it consists of vertical stripes layered on top of a seamless texture.
Source V. Hartikainen
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz