A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
A floral background formed from numerous clones of flower 117.
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen