A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Prismatic Geometric Pattern Background No Black
Source GDJ
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Prismatic Hypnotic Pattern No Background
Source GDJ
A seamless background tile of aged paper with shabby look.
Source V. Hartikainen