PHP has one of the greatest, in my opinion, dependency managers – Composer. The tool works mostly with the public projects via the Packagist website (although it also supports private repositories).
There are over 200,000 packages available on the Packagist to choose from. However, the stats could be a lot better.
Today I came across a mind-blowing visualization of the composer packages and the dependencies between them. Have a look at Code Galaxies Visualization. You can find specific packages via the search, or interactively navigate the star map, like you are in the spaceship.
Stunning!